At its peak the SEC has Bama, Auburn, LSU, UF, UGA, and UT. A&M should probably be on that list too but since they haven’t really sniffed the playoff or SEC Championship and rarely won the Big 8/12 we will leave them off for now.
Edit: Well, you’re stretching a little with Oregon and Washington so I guess A&M should make it. Oregon played for it once and Washington did split one back in 1991 but they’re not capable of doing it now. The same is true of Miami. I don’t see them ever winning it again. Times have changed down there.