Tyson that night was a beast no doubt..... That being said, he was never the best heavyweight of all time though, in the 70's he would have lost a few fights- Ali, Foreman, Holmes, and Frazier gives him serious trouble, Liston puts him down too. Go back farther and Louis gets him, prime Walcott too, Marciano puts him away too because of his unmatched heart and conditioning and "Susie Q" eventually finds Mike's chin. The great Cuban fighter Teofilio Stevenson would give Tyson trouble too.
Tyson was a BEAST , no doubt.... but he was not the best ever, not even close .