I only included the decades where Bama was ranked. And I think I forgot to do the 70s. Here are the 50's, 70s, and 90s
1950s
1. Oklahoma (96.7 percentile, eight top-fives, two No. 1s)
2. Ole Miss (91.7, five top-fives, one No. 1)
3. Michigan State (91.6, four top-fives, one No. 1)
4. Georgia Tech (87.9, five top-fives, one No. 1)
5. Ohio State (85.4, two top-fives, one No. 1)
1970s
Bear Bryant and the Crimson Tide had nine top-five seasons in the 1970s. Malcolm Emmons/USA TODAY Sports
1. Alabama (98.2 percentile, nine top-fives, two No. 1s)
2. Nebraska (98.0, seven top-fives, three No. 1s)
3. Michigan (97.6, four top-fives)
4. Oklahoma (97.3, eight top-fives, two No. 1s)
5. Ohio State (96.0, four top-fives, one No. 1)
1990s
1. Florida State (97.0 percentile, eight top-fives, three No. 1s)
2. Nebraska (96.1, six top-fives, two No. 1s)
3. Florida (94.5, five top-fives)
4. Tennessee (93.6, two top-fives)
5. Penn State (92.8, two top-fives, one No. 1)