I think the expanded playoffs combined with portal and NIL opens it up a little more than in the recent past. I think you can win a Natty at the following schools...
ACC: Miami, Clemson, FSU
Big 10: tOSU, Michigan, USC, Oregon, Washington, PSU
SEC: Alabama, Georgia, Florida, LSU, Texas, Texas A&M, Oklahoma, Auburn, Tennessee
Notre Dame
I don't see it at Ole Miss. Ole Miss really went all in this year with NIL. Supposedly, they made a commitment to fund it as part of the deal to sign Kiffin to a long term deal, as he was using the Auburn job as leverage. If they continued to make that kind of commitment every year, I guess I would list them too. I just don't see that happening.