It's 100% George Foreman....too strong too tough and mentally stronger as well....it took HUGE haymakers to drop either guy but only George beat greats!

George's wins over Joe Frazier seal the deal for me....that's a dominant heavyweight right there, Frazier was not only undefeated but some considered him unbeatable at the time and George walked through him.

Tyson never fought and beat a guy as tough or as dangerous as Joe Frazier....unless you count Bruno or Rudduck and even then it's a BIG stretch to compare those guys to Frazier