Its hard to pick really, Tyson and Lewis had the much better longer title reigns, both could get careless against lesser opposition (Douglas, Mcall, Rahman) and at their best H2H they could beat anyone Holyfield has more losses however you could argue he fought the better opposition with Moorer, Foreman, Holmes, Bowe, Cooper etc. Tough. Out of the 3 Tyson had the potential to be the greatest of all time, but he messed it all up (thats another story), Holyfield achieved what he could and so did Lewis whereas Tyson's legacy has lots of question marks.
EVANDER IS THE BEST , hands down!!, evander is a natural cruiser or even lhw and he did beat super hw, a prime evander 89-90-91 would beat lewis and tyson any day of the week. iron chin, good skill, lion heart, 2 balls, good hitting power,good speed.
Lewis Holyfield Tyson I think they will always be ranked closely in history, Lewis seems to have more debate about him than any other heavy. Is this because he ain't American or because he broke the USA monopoly on the division? I don't know, but he does seem to get a rough ride. Lewis when focused was pretty much unbeatable, and possibly against anyone in history. Holyfield was fantastic and will always be fairly looked at has a great, but has people have pointed out he was inconsistent. Tyson was an animal in his prime but against mediocre opposition. He would be easier to judge if he had fought the likes of Lewis,Holyfield and Bowe when he was percieved to be at his best. Or someone with the belief that they could beat him. Which these guys had in abundance. Either way Lewis,Holyfield and Tyson fought in second best era in history IMO, and all three could of competed in any era.
Lewis Tyson Holyfield. Lewis and Holyfield would always beat any version of Tyson head to head though.