there are only about 12 football teams that actually matter to TV year in and year out. the rest are filler and occasional contenders. 12 might be generous. B1G = Michigan and OSU. SEC = Alabama, Florida, LSU B12 = Texas, OU Pac12 = USC, Oregon ACC = FSU, ND
contenders: MSU, Wisconsin, So Car, Auburn, Georgia, TA&M, Arkansas, Tennessee, OkSt, Stanford, UCLA, Clemson, Penn St...Miami?
I may be missing someone but generally speaking the first group are elite programs and the contenders tend to matter every year. Other teams can rise up and have a big year on occasion, but its rare and random. Basically any team in any P5 conference could do that as well. None actually move the needle in terms of eyeballs nationally unless they have a special one-time player (flutie, RG3, etc). So basically there are 25-26 schools that have some form of national interest in football, the other 40 are filler