Am I outta line with this heavyweight ATG list?

Cool avatar dude, but I have to disagree on Marciano not being able to compete. So guys like Archie Moore, Bob Foster, David Haye, Michael Moorer, Evander Holyfield, Michael Spinks, Doug Jones, Qawi, etc could compete with heavyweights, but Marciano can't? Jersey Joe Walcott had his best wins late in his career including a horrific ko of Charles and was a highly skilled fighter, more so than most HW's today. The Klits have that leaning back type of defense Steward used to train on Tommy Hearns, but they don't even come close to the stamina Rocky had so he would of caught up to them eventually. They might of dropped him, but no way they keep him there. Marciano had several stoppages on heavyweights weighing 220-230 no problem.