ive been saying more or less all of this for the past 25 years...Tyson would of beaten them all...with the exception maybe being a 1979-1980 Larry Holmes THAT Larry Holmes was as complete a fighter as there ever was, the night Ali beat Cleveland Williams...THAT Ali would of also given Tyson the fight of his life...other than that...Tyson had the hand speed, foot speed, power and DEFENSIVE genius..that most "exsperts" have often overlooked...that's what Originally made him special...people couldn't HIT HIM (not cleanly anyway) and if you can't hit a prime Tyson...he'd hit you back with everything he had witch was delivered with lightning fast hands with power way back then...bye 1989-1990...his defensive genius was slipping and that was the beginning of the end for mike without his defence...he was a sitting Target and all that happened after that time was predictable.
Cleveland Williams was a cripple, recovering from a wound by a .357 Magnum, parts of intestine removed, limping with a shorter and atrophied left leg... That bout was a joke and all smoke & mirrors to boost Ali's hype, Williams wasn't even that good in his prime either... 60s Clay was a skinny cruiser who fought awful competition, plus two fixed bouts with the size-bully, cherry-picker of that era, Sonny Liston... Clay got a gift vs 180lbs Doug Jones and was put in la-la-land by another 180lbs bum Cooper for fuck's sake... He has no chance whatsover vs Tyson, 70s Ali who was bigger, stronger and more durable with experience would maybe, maybe, last a bit more... No one from past eras would beat Tyson, non even the first prototype of modern heavies, George Foreman, neither Larry Holmes... To beat Tyson you need a modern great fighter with an insane chin, who punched very well in combinations, who's not afraid, like Holyfield, or these modern super-heavyweight freaks like Lewis and the Klitschko brothers...