Since we're throwing around names like Otto Graham....
I don't think you can put the really old timers in the GOAT categories, not the way the game is played now. The overall level of talent is light years ahead of the 50s. In an alternate reality, I think Manning or Brady would absolutely annihilate a top tier 50s defense, but Sid Luckman or Otto Graham against the Broncos or Seahawks defense? Zero chance.
Folks gloss over the fact that defensive players in this era are much bigger than. That matters.
Truly physical freaks like JJ Watt or Clowney that can absolutely fly at 6'5+ and 280+ pounds were very uncommon in the 80s/90s.
Big Fred Smerlas was 6'3, 270 lb. He'd be asked to gain 50 lbs if he played nose tackle these days.