So let’s rank this from most to least likely 

1. Lane Kiffin 
2. Jeff Lebby
3. Debroer
4. Freeze
5. Sark
6. Drinkwitz
7. Heupel
8. Clark Lea
9. Napier 
10. Beamer
11. Venables
12. Kirby
13. Elko
14. Pittman 
15. Kelly
16. Stoops