Here's the top 20 in adjusted scoring allowed (average points allowed per game above or below opponent's average points scored). Only FBS games included. I'm also including ACC schools.

1. Georgia -21.955
2. Clemson -13.660
3. Oklahoma State -13.379
4. Wisconsin -11.319
5. Notre Dame -11.302
6. Penn State -11.065
7. Texas A&M -10.573
8. Cincinnati -9.743
9. Kansas State -9.545
10. Michigan -9.443
11. Boise State -9.341
12. Baylor -9.216
13. San Diego State -8.833
14. NC State -8.791
15. Appalachian State -8.326
16. Louisiana -8.263
17. Alabama -8.182
18. Iowa -7.921
19. Iowa State -6.915
20. Minnesota -6.503

ACC Schools:
28. Virginia Tech -4.922
46. Pittsburgh -2.868
48. Syracuse -2.655
50. Florida State -2.556
53. Boston College -2.074
65. Miami -0.600
66. Louisville -0.336
82. Wake Forest +2.117
88. UNC +2.732
100. UVA +4.497
101. Georgia Tech +4.631
122. Duke +13.327