Here's the teams IMO aside from Bama, who will be elite and have legit National Championship potential:
USC (Has a future NFL QB to lead them, Sam Darnold is at least a 1st round lock in the 2018 or 19 draft because he's that talented)
FSU (has the talent and elite athletes plus potential NFL star Derwin James is coming back and their defense is not going to be nearly as leaky as it was)
Penn St (Only losing 5 senior starters and return one of the best running backs in the country, who is future NFL starter)
OSU (Has the talent, playmakers and elite defense to be truly special but needs to show they have an O-coordinator who will unlock the playbook for them to beat Bama/Clemson level teams)
Talented sleeper teams who may be on that championship level next year too:
If LSU, Clemson & Michigan aren't completely gutted by some key talent leaving for the NFL (they each have enough elite talent, front 7 on D and playmakers to be playoff bound)
A big sleeper is Miami, they have the explosive elite defense, team speed and talent at key skill positions to be a team with an extremely high potential but now I don't know if they have the offense & consistency plus they have to replace some impact players.
FYI I don't trust any Big 12 teams and any Big Ten team not named OSU/PSU/Michigan next year to beat USC or an elite ACC/SEC squad next year on neutral turf.