SEC teams' top 3 conference teams played from 1933 (formation of SEC) through 1991 (Expansion 1):
Alabama: Tennessee (58), Vanderbilt (56), Miss St (55)
Auburn: UGA (58), Florida (56), Miss St (52)
Florida: UGA (58), Auburn (56), Miss St (43)
UGA: Auburn (58) & Florida (58), Kentucky (45)
Kentucky: Tennessee (59), Vanderbilt (49), UGA (45)
LSU: Miss St (58), Ole Miss (57), Kentucky (42)
Ole Miss: Miss St (58), LSU (57), Tennessee (49)
Miss St: LSU (58) & Ole Miss (58), Alabama (55)
Tennessee: Kentucky (59), Alabama (58), Vanderbilt (57)
Vanderbilt: Tennessee (57), Alabama (56), Kentucky (49)
Obviously, the red/bold are the teams that have a cross-division rival in their top 3. And these are the same 4 teams that held the rest of the conference hostage.
The green are the other, real options there were. Miss State freakin' played everybody every year, and they were just an afterthought and paired with Kentucky because they were probably the last 2 picked for the kickball team.
And yes, sorry to harp on it again, but the powers that be are woefully lazy when it comes to scheduling. They want what they want and then they drag their feed and throw their hands up when it comes to the rest.