I think the 12 this year would've been "something" like this
- Michigan
- Washington
- Texas
- Alabama
- Florida St
- Georgia
- Ohio St
- Oregon
- Missouri
- Penn St
- Oklahoma
- Liberty
But yes, now that Washington, Oregon, Texas, and Oklahoma joined the Big 10 and SEC, it wouldn't been as you said.
There are 4 huge leagues and then everyone else. And especially after stealing all the teams, those tow mega-leagues will take most of the spots.
I can't stand it, but that's how it is. Clemson will be back soon, looking at their recruiting.
TCU, Utah, and some others from the Big 12 or ACC will pop up every once in a while.
They'll save the 12th spot for whoever the best "other" non-P4 team