Real question is who do they put in out of: Bama (1 loss to a top 4/non-champ), michigan (1 loss to a top 4/ champ), or OU (1 loss to a no-top 4/ champ).
I know who I think would be most deserving based on their 'moving goal post' precepts, but I know that isn't actually the best team and likely not who they would pick.
It would be LSU #1, Clemson#2, ND #3, and Bama #4... unless their SEC bias is so strong they specifically want to see another all SEC title games, then they'd switch ND and Bama.