Yeah, I've got my doubts that Tyson was the G.O.A.T. (Greatest of all Time) too. Style makes fights and certain style fighters like Bonecrusher, Tony Tucker etc made Tyson look average even at his peek. Buster Douglas had that style Tyson didn't like, although Tyson was beyond his prime then though.
Ali wasn't big but could also take a punch and could "dance". Hard to say who would have won. The "bro's" like Tyson though, coz of his physique
But Tyson is certainly in contention for G.O.A.T. though.