13. 1978 Steelers (won Super Bowl XIII)
Combine the incredible “Steel Curtain” defense with an MVP season from quarterback Terry Bradshaw and what do you get? A team that couldn’t be stopped, that’s what.
The Steelers offense had Bradshaw and Franco Harris in the backfield, with John Stallworth and Lynn Swann catching passes. This team surprised many, as the Steelers had previously just been known for their defenses. They beat the Cowboys in the Super Bowl to become the first franchise to win 3 Super Bowls.