Ok, the top 7 are inarguable so I'll look at the Miami, Florida St, and Texas.
Miami has won too many titles. Simple as that. Conference titles also even though it's not fair because Penn St. hasn't been a part of a conference for a long time.
Florida St. historically has dominated their conference more than any other team ever. Has two titles just like Penn St., but also has been voted as national champions many other times over the years by some of the institutions before the BCS.
Texas is tough. Texas has one more title and has been better historically.