He would whip anyone who was fighting at the time, but not even close to all time! Watch some of the epic heavyweight battles of the 60's and 70's. Ali-Frazier, Frazier-Norton, Ali-Norton, Ali-Foreman...........fights where they beat the crap out of each other for 15 rounds! Half of those fights would have been stopped in the first round in the era Tyson fought in. And go back farther than that: Demsey, Marciano, Patterson, LOUIS!!!! Tyson was not even in the same league. Could he have been? Maybe, with the right training......but never mentally.