Rivals' defensive tackles lists always have a high bust rate. This year's class was actually pretty good.
There were 12 defensive tackles on the 2015 Rivals 100 - six of those twelve were multi-year starters for the program that they signed with. And it should've been seven out of twelve, as Albert Huggins would've been a multi-year starter at any program other than Clemson.
Eight of the 24 have been selected in the 2018 or 2019 NFL Draft - again, that's a pretty solid hit rate. Three of them went in the first round.
The #6, #10, and #20 guys were complete busts.
Nebraska signed two (2) guys on this list and recently added the #15 guy as a grad transfer.
Two-year starter and a 6th-round draft choice
1.) Kahlil McKenzie, Tennessee; 5-stars, 6.1 RR, #6 on the Rivals 100, 3rd-best prospect in California; Two-year starter at DT for the Vols; Missed the 2nd half of the 2016 season due to a torn pectoral muscle; Declared early for the 2018 NFL Draft and was taken in the 6th round by the Kansas City Chiefs; Had 72 tackles, 5.5 TFL, 3 sacks and a forced fumble in his career.
Something's wrong when a 5-star DT is playing in the Arena League
2.) Trenton Thompson, Georgia; 5-stars, 6.1 RR, #7 on the Rivals 100, #1-overall prospect in Georgia; Started 3 games in 2017 and 7 games in 2016; Best season was 2016, where he had 56 tackles and 5 sacks - he had zero sacks in 2017; Declared early for the 2018 NFL Draft but went undrafted and is now playing in the Arena League.
Second-team All-American and an NFL first round draft pick
3.) Da'Ron Payne, Alabama; 5-stars, 6.1 RR, #19 on the Rivals 100, #1-overall prospect in Alabama; Two-year starter at nose guard for Alabama; Second-team All-American and first-team All-SEC in 2017; Declared early for the 2018 NFL Draft and was taken 13th-overall by the Washington Redskins; Finished career with 102 tackles, 5 TFL, 3 sacks and a forced fumble.
3x first-team All-American and an NFL first rounder
4.) Christian Wilkins, Clemson; 5-stars, 6.1 RR, #21 on the Rivals 100, #1-overall prospect in Connecticut; Four-year starter and a 3x first-team All-American; Finished his career with 250 tackles, 41 TFL, 16 sacks, and three forced fumbles; Was taken 13th-overall in the first round of the 2019 NFL Draft by the Miami Dolphins.
Second-team All-SEC and a 7th-round NFL Draft pick
5.) Terry Beckner, Missouri; 4-stars, 6.0 RR, #36 on the Rivals 100, #1-overall prospect in Illinois; Two-year starter at DT for Missouri and was 2nd-team All-SEC in 2018; Backup in 2016 while recovering from a torn ACL in 2015 - injured his other knee midway through the 2016 season; Freshman All-American in 2015 as he started 5 games that season; Finished career with 123 tackles, 32.5 TFL, and 13.5 sacks; Was taken in the 7th round of the 2019 NFL Draft by the Tampa Bay Buccaneers.
6.) Noah Jefferson, Southern Cal; 4-stars, 6.0 RR, #52 on the Rivals 100, #1-overall prospect in Nevada; Now at Florida Atlantic where he was a backup DT for Lane Kiffin in 2018; Spent 2017 at Arizona Western JUCO; Spent two seasons at USC, where he started one game as a true freshman and started the 2016 season opener, but failed out of school, prompting the move to Arizona Western.
7.) Shy Tuttle, Tennessee; 4-stars, 6.0 RR, #66 on the Rivals 100, 2nd-best prospect in North Carolina; Starting DT for the Vols in 2018 after being a reserve in 2015, 2016, and 2017; Finished career with 79 tackles, 6 TFL and a sack; Went undrafted in 2019.
Ontario, Canada product has started 24 games so far at OU
8.) Neville Gallimore, Oklahoma; 4-stars, 5.9 RR, #83 on the Rivals 100; Has started 24 games at DT over the past three seasons for the Sooners; Redshirted in 2015; The Canadian product has 118 tackles, 10.5 TFL, 4.5 sacks, and three forced fumbles over three seasons in Norman and has one more year of eligibility left.
9.) Albert Huggins, Clemson; 4-stars, 5.9 RR, #88 on the Rivals 100, 2nd-best prospect in South Carolina; Key backup on Clemson's defensive line; Started 2 games in 2018 and two games in 2017; Finished career with 83 tackles, 11.5 TFL, and 7 sacks; Went undrafted earlier this month.
10.) Jacob Daniel, Southern Cal; 4-stars, 5.9 RR, #91 on the Rivals 100, 13th-best prospect in California; Reserve offensive guard who appeared in one (1) game in 2018 after moving from DT; Redshirted in 2017; Appeared in 11 games between 2015 and 2016 and had 9 tackles.
Second-team All-Pac 12 in both 2016 and 2017
11.) JoJo Wicker, Arizona State; 4-stars, 5.9 RR, #95 on the Rivals 100, 14th-best prospect in California; Three-year starter for the Sun Devils; Second-team All-Pac 12 in both 2016 and 2017; Declared early for the 2018 NFL Draft but was not taken; Finished his Arizona State career with 102 tackles, 32 TFL, and 12.5 sacks.
12.) Darian Roseboro, North Carolina State; 4-stars, 5.9 RR, #100 on the Rivals 100, 4th-best prospect in North Carolina; Had 37 tackles and 7.5 TFL as a DE in 2018 despite dealing with a high ankle sprain all season; Was a reserve in 2015, 2016, and 2017 and went undrafted earlier this month.
Fehoko was a starter in Baton Rouge until a torn biceps sidelined him
13.) Breiden Fehoko, Texas Tech; 4-stars, 5.9 RR, #122 on the Rivals 250, 2nd-best prospect in Hawaii; Now at LSU, where he was a starter until he tore a biceps muscle, forcing him to miss the remainder of the season; Sat out 2017 due to NCAA transfer regs; Was a two-year starter for Texas Tech at defensive tackle; Had 38 tackles, 7.5 TFL, and two sacks over two seasons in Lubbock; Honorable-mention All-Big 12 as a true freshman in 2015.
Shreveport native was an All-American and a first round NFL Draft pick
14.) Jerry Tillery, Notre Dame; 4-stars, 5.9 RR, #145 on the Rivals 250, 6th-best prospect in Louisiana; Three-year starter at nose guard for the Irish and was 2nd-team All-American in 2018; Led Notre Dame with 4.5 sacks in 2017; Finished career with 135 tackles, 24.5 TFL, 13.5 sacks and 4 forced fumbles; Was taken in the first round (28th-overall) of the 2019 NFL Draft by the Los Angeles Chargers.
Is a Husker now
15.) Darrion Daniels, Oklahoma State; 4-stars, 5.9 RR, #161 on the Rivals 250, 23rd-best prospect in Texas; Now at Nebraska; Injuries limited him to 4 games for Okie State in 2018 and he was able to take a redshirt as a result; Was starting DT for the Cowboys in 2017; Was a key reserve on Okie State's D-line in 2015 and 2016; Had 64 tackles and 8.5 TFL over four seasons in Stillwater.
Second-team All-ACC and an NFL 5th-round draft pick
16.) Tim Settle, Virginia Tech; 4-stars, 5.8 RR, #174 on the Rivals 250, 10th-best prospect in Virginia; Starting DT for the Hokies in 2017; Second-team All-ACC in 2017; Reserve in 2016 and redshirted in 2015; Declared early for the 2018 NFL Draft and was taken in the 5th round by the Washington Redskins; Finished his two-year career with 53 tackles, 19.5 TFL, and 4 sacks.
17.) Darvin Taylor, Florida State; 4-stars, 5.8 RR, #216 on the Rivals 250, 11th-best prospect in Virginia; Announced last year that he is going on a medical; Never played a down in three years at Florida State due to injuries.
18.) Marquise Overton, Oklahoma; 4-stars, 5.8 RR, #217 on the Rivals 250, 3rd-best prospect in Oklahoma; Reserve DT in 2018; Started 9 games at DT for the Sooners in 2017; Played in 8 games as a reserve in 2015 and 2 games in 2016 before missing the remainder of that season due to injury; Has 60 tackles, 4 TFL, and 1 sack in his career so far, and has one more year of eligibility.
Native of Denmark was a 3-year starter for the Hogs and a 4th round NFL Draft pick
19.) Hjalte Froholdt, Arkansas; 4-stars, 5.8 RR, #221 on the Rivals 250, 37th-best prospect in Florida; Three-year starter at left guard and center for the Hogs; Played 10 games at DT as a true freshman in 2015 and was moved to the offensive line the following spring; Was taken in the 4th round of the 2019 NFL Draft by the New England Patriots.
20.) Thomas Toki, Washington State; 4-stars, 5.8 RR, 49th-best prospect in California; Now at Arkansas State but did not play a down in 2018; Didn't qualify out of HS and ended up at College of San Mateo, a California JUCO.
Had a career-high 41 tackles in 2018
21.) Khalil Davis, Nebraska; 4-stars, 5.8 RR, 3rd-best prospect in Missouri; A reserve in 2018, Davis led the Huskers' D-line with 41 tackles last year; Finished 2017 as a backup DE; Was a reserve DT in 2016, and redshirted in 2015; Has 61 tackles, 14 TFL, 5 sacks, and a forced fumble over three seasons at NU.
22.) Du'Vonta Lampkin, Texas; 3-stars, 5.7 RR, 48th-best prospect in Texas; Couldn't enroll at Texas due to a foreign language requirement and ended up at Oklahoma instead; Redshirted in 2015 and served a six-game suspension at the start of the 2016 season; Started two games in 2017 and then declared for the 2018 NFL Draft, where he went undrafted - he's now in the Arena League; Finished his career at OU with 28 tackles, 7 TFL, and 1 sack.
Finished 2018 as the Huskers' starting nose guard
23.) Carlos Davis, Nebraska; 3-stars, 5.7 RR, 5th-best prospect in Missouri; Started the last 8 games of 2018 at nose guard; Starting DE for the Huskers in 2017; Made 4 starts at DT in 2016; Redshirted in 2015; Has 93 tackles and 5.5 sacks over three seasons at NU.
Three-year starter for aTm and was taken in the 5th round of the 2019 NFL Draft
24.) Kingsley Keke, Texas A&M; 3-stars, 5.7 RR, 63rd-best prospect in Texas; Three-year starter at DT for A&M; Finished career with 150 tackles, 21 TFL, 12 sacks and a forced fumble; Was taken in the 5th round of the 2019 NFL Draft by the Green Bay Packers.
https://n.rivals.com/position_rankings/football/2015/DT
There were 12 defensive tackles on the 2015 Rivals 100 - six of those twelve were multi-year starters for the program that they signed with. And it should've been seven out of twelve, as Albert Huggins would've been a multi-year starter at any program other than Clemson.
Eight of the 24 have been selected in the 2018 or 2019 NFL Draft - again, that's a pretty solid hit rate. Three of them went in the first round.
The #6, #10, and #20 guys were complete busts.
Nebraska signed two (2) guys on this list and recently added the #15 guy as a grad transfer.

Two-year starter and a 6th-round draft choice
1.) Kahlil McKenzie, Tennessee; 5-stars, 6.1 RR, #6 on the Rivals 100, 3rd-best prospect in California; Two-year starter at DT for the Vols; Missed the 2nd half of the 2016 season due to a torn pectoral muscle; Declared early for the 2018 NFL Draft and was taken in the 6th round by the Kansas City Chiefs; Had 72 tackles, 5.5 TFL, 3 sacks and a forced fumble in his career.

Something's wrong when a 5-star DT is playing in the Arena League
2.) Trenton Thompson, Georgia; 5-stars, 6.1 RR, #7 on the Rivals 100, #1-overall prospect in Georgia; Started 3 games in 2017 and 7 games in 2016; Best season was 2016, where he had 56 tackles and 5 sacks - he had zero sacks in 2017; Declared early for the 2018 NFL Draft but went undrafted and is now playing in the Arena League.

Second-team All-American and an NFL first round draft pick
3.) Da'Ron Payne, Alabama; 5-stars, 6.1 RR, #19 on the Rivals 100, #1-overall prospect in Alabama; Two-year starter at nose guard for Alabama; Second-team All-American and first-team All-SEC in 2017; Declared early for the 2018 NFL Draft and was taken 13th-overall by the Washington Redskins; Finished career with 102 tackles, 5 TFL, 3 sacks and a forced fumble.

3x first-team All-American and an NFL first rounder
4.) Christian Wilkins, Clemson; 5-stars, 6.1 RR, #21 on the Rivals 100, #1-overall prospect in Connecticut; Four-year starter and a 3x first-team All-American; Finished his career with 250 tackles, 41 TFL, 16 sacks, and three forced fumbles; Was taken 13th-overall in the first round of the 2019 NFL Draft by the Miami Dolphins.

Second-team All-SEC and a 7th-round NFL Draft pick
5.) Terry Beckner, Missouri; 4-stars, 6.0 RR, #36 on the Rivals 100, #1-overall prospect in Illinois; Two-year starter at DT for Missouri and was 2nd-team All-SEC in 2018; Backup in 2016 while recovering from a torn ACL in 2015 - injured his other knee midway through the 2016 season; Freshman All-American in 2015 as he started 5 games that season; Finished career with 123 tackles, 32.5 TFL, and 13.5 sacks; Was taken in the 7th round of the 2019 NFL Draft by the Tampa Bay Buccaneers.
6.) Noah Jefferson, Southern Cal; 4-stars, 6.0 RR, #52 on the Rivals 100, #1-overall prospect in Nevada; Now at Florida Atlantic where he was a backup DT for Lane Kiffin in 2018; Spent 2017 at Arizona Western JUCO; Spent two seasons at USC, where he started one game as a true freshman and started the 2016 season opener, but failed out of school, prompting the move to Arizona Western.
7.) Shy Tuttle, Tennessee; 4-stars, 6.0 RR, #66 on the Rivals 100, 2nd-best prospect in North Carolina; Starting DT for the Vols in 2018 after being a reserve in 2015, 2016, and 2017; Finished career with 79 tackles, 6 TFL and a sack; Went undrafted in 2019.

Ontario, Canada product has started 24 games so far at OU
8.) Neville Gallimore, Oklahoma; 4-stars, 5.9 RR, #83 on the Rivals 100; Has started 24 games at DT over the past three seasons for the Sooners; Redshirted in 2015; The Canadian product has 118 tackles, 10.5 TFL, 4.5 sacks, and three forced fumbles over three seasons in Norman and has one more year of eligibility left.
9.) Albert Huggins, Clemson; 4-stars, 5.9 RR, #88 on the Rivals 100, 2nd-best prospect in South Carolina; Key backup on Clemson's defensive line; Started 2 games in 2018 and two games in 2017; Finished career with 83 tackles, 11.5 TFL, and 7 sacks; Went undrafted earlier this month.
10.) Jacob Daniel, Southern Cal; 4-stars, 5.9 RR, #91 on the Rivals 100, 13th-best prospect in California; Reserve offensive guard who appeared in one (1) game in 2018 after moving from DT; Redshirted in 2017; Appeared in 11 games between 2015 and 2016 and had 9 tackles.

Second-team All-Pac 12 in both 2016 and 2017
11.) JoJo Wicker, Arizona State; 4-stars, 5.9 RR, #95 on the Rivals 100, 14th-best prospect in California; Three-year starter for the Sun Devils; Second-team All-Pac 12 in both 2016 and 2017; Declared early for the 2018 NFL Draft but was not taken; Finished his Arizona State career with 102 tackles, 32 TFL, and 12.5 sacks.
12.) Darian Roseboro, North Carolina State; 4-stars, 5.9 RR, #100 on the Rivals 100, 4th-best prospect in North Carolina; Had 37 tackles and 7.5 TFL as a DE in 2018 despite dealing with a high ankle sprain all season; Was a reserve in 2015, 2016, and 2017 and went undrafted earlier this month.

Fehoko was a starter in Baton Rouge until a torn biceps sidelined him
13.) Breiden Fehoko, Texas Tech; 4-stars, 5.9 RR, #122 on the Rivals 250, 2nd-best prospect in Hawaii; Now at LSU, where he was a starter until he tore a biceps muscle, forcing him to miss the remainder of the season; Sat out 2017 due to NCAA transfer regs; Was a two-year starter for Texas Tech at defensive tackle; Had 38 tackles, 7.5 TFL, and two sacks over two seasons in Lubbock; Honorable-mention All-Big 12 as a true freshman in 2015.

Shreveport native was an All-American and a first round NFL Draft pick
14.) Jerry Tillery, Notre Dame; 4-stars, 5.9 RR, #145 on the Rivals 250, 6th-best prospect in Louisiana; Three-year starter at nose guard for the Irish and was 2nd-team All-American in 2018; Led Notre Dame with 4.5 sacks in 2017; Finished career with 135 tackles, 24.5 TFL, 13.5 sacks and 4 forced fumbles; Was taken in the first round (28th-overall) of the 2019 NFL Draft by the Los Angeles Chargers.

Is a Husker now
15.) Darrion Daniels, Oklahoma State; 4-stars, 5.9 RR, #161 on the Rivals 250, 23rd-best prospect in Texas; Now at Nebraska; Injuries limited him to 4 games for Okie State in 2018 and he was able to take a redshirt as a result; Was starting DT for the Cowboys in 2017; Was a key reserve on Okie State's D-line in 2015 and 2016; Had 64 tackles and 8.5 TFL over four seasons in Stillwater.

Second-team All-ACC and an NFL 5th-round draft pick
16.) Tim Settle, Virginia Tech; 4-stars, 5.8 RR, #174 on the Rivals 250, 10th-best prospect in Virginia; Starting DT for the Hokies in 2017; Second-team All-ACC in 2017; Reserve in 2016 and redshirted in 2015; Declared early for the 2018 NFL Draft and was taken in the 5th round by the Washington Redskins; Finished his two-year career with 53 tackles, 19.5 TFL, and 4 sacks.
17.) Darvin Taylor, Florida State; 4-stars, 5.8 RR, #216 on the Rivals 250, 11th-best prospect in Virginia; Announced last year that he is going on a medical; Never played a down in three years at Florida State due to injuries.
18.) Marquise Overton, Oklahoma; 4-stars, 5.8 RR, #217 on the Rivals 250, 3rd-best prospect in Oklahoma; Reserve DT in 2018; Started 9 games at DT for the Sooners in 2017; Played in 8 games as a reserve in 2015 and 2 games in 2016 before missing the remainder of that season due to injury; Has 60 tackles, 4 TFL, and 1 sack in his career so far, and has one more year of eligibility.

Native of Denmark was a 3-year starter for the Hogs and a 4th round NFL Draft pick
19.) Hjalte Froholdt, Arkansas; 4-stars, 5.8 RR, #221 on the Rivals 250, 37th-best prospect in Florida; Three-year starter at left guard and center for the Hogs; Played 10 games at DT as a true freshman in 2015 and was moved to the offensive line the following spring; Was taken in the 4th round of the 2019 NFL Draft by the New England Patriots.
20.) Thomas Toki, Washington State; 4-stars, 5.8 RR, 49th-best prospect in California; Now at Arkansas State but did not play a down in 2018; Didn't qualify out of HS and ended up at College of San Mateo, a California JUCO.

Had a career-high 41 tackles in 2018
21.) Khalil Davis, Nebraska; 4-stars, 5.8 RR, 3rd-best prospect in Missouri; A reserve in 2018, Davis led the Huskers' D-line with 41 tackles last year; Finished 2017 as a backup DE; Was a reserve DT in 2016, and redshirted in 2015; Has 61 tackles, 14 TFL, 5 sacks, and a forced fumble over three seasons at NU.
22.) Du'Vonta Lampkin, Texas; 3-stars, 5.7 RR, 48th-best prospect in Texas; Couldn't enroll at Texas due to a foreign language requirement and ended up at Oklahoma instead; Redshirted in 2015 and served a six-game suspension at the start of the 2016 season; Started two games in 2017 and then declared for the 2018 NFL Draft, where he went undrafted - he's now in the Arena League; Finished his career at OU with 28 tackles, 7 TFL, and 1 sack.

Finished 2018 as the Huskers' starting nose guard
23.) Carlos Davis, Nebraska; 3-stars, 5.7 RR, 5th-best prospect in Missouri; Started the last 8 games of 2018 at nose guard; Starting DE for the Huskers in 2017; Made 4 starts at DT in 2016; Redshirted in 2015; Has 93 tackles and 5.5 sacks over three seasons at NU.

Three-year starter for aTm and was taken in the 5th round of the 2019 NFL Draft
24.) Kingsley Keke, Texas A&M; 3-stars, 5.7 RR, 63rd-best prospect in Texas; Three-year starter at DT for A&M; Finished career with 150 tackles, 21 TFL, 12 sacks and a forced fumble; Was taken in the 5th round of the 2019 NFL Draft by the Green Bay Packers.
https://n.rivals.com/position_rankings/football/2015/DT