You're not winning the argument Wass! It's one thing speculating about the Klitschko's against Tyson but Valuev just didn't have the tools or ability to match up to a wrecking ball like Tyson.
Valuev couldn't even legitimately beat a 60 year old Holyfield! Of course, he fought on very close terms with Haye, which shows you the quality of Haye.
He had the size and that would cause Tyson big problems alone, look how frustrated Smith got Tyson without barely throwing a punch. Valuev wasn't so cowardly and would attempt to fight, Tyson wouldn't be able to reach his head.
Tyson couldn't beat a 80 year old Holyfield either, yeah the Haye fight showed he could be competitive with the smaller, faster heavyweights..
As I said before size is only one factor in a fight and can be negated by power speed and skill. There have been giant fighters in the past but they only really make an impression when the talent isn't present in the division. There are some superheavy's like Lewis and the Klitschko's who have talent to go along with size, Valuev's talent is modest at best and if Haye could make him do the chicken dance the Tyson would roast him!
Kevin McBride who was a fat useless giant handled Tinkerbell Tyson pretty easily from what I can recall....
Wass you have no idea! You have to take a peak fighter and in this case a peak Tyson would beat almost any other heavyweight in history bar an Ali or Louis. Anyone who knows anything about boxing and witnessed Tyson on his way to the championship would know that he was a force of nature and fighters like Danny Williams and Kevin Mcbride woul have been lucky to last a round with him during his prime.