That fat out of shape Foreman would be a top 10 HW today. Make a list. Let's do a comparison. 25 years is a quarter of a century. Surely that's a sufficient amount of time for us to see some kind of progression.
Since Norton is miles better and more awkward than Tatum , i see Joshua having major problems in that fight.
Norton was stopped by big punchers early. Joshua would be the biggest and most aggressive puncher we would of faced.
He had better control over his composure which gave him better stamina. Hence - he had better endurance and wasn't at risk of gassing out for a few rounds like Joshua has
Having good stamina is not the same thing as pacing yourself. Pacing yourself is learned with experience. You can not do the same with stamina.
Who puts pressure on opponents and unloads when he hurts them. You have seen this in every single Joshua fight just like everyone else.
Fine you did not, but he did pace himself well. He kept is output low during his fights, because he was older, heavier and needed to to make twelve rounds.
Based on what? The problem with guys like you, is that you're so blinded, you are unable to have an objective debate. You're a huge fan like Okon. I once said to him: "I think guys like Sanders and Byrd would have caused AJ some issues" His response: "Nah, AJ proved he could handle southpaws by beating Charles Martin" You better hope that the AJ train doesn't derail. Because if it does, you're going to need a lot of therapy.
Marciano would be a cruiserweight. Case by case basis. I think overall now days, there are more fighters with better overall skill sets as a whole, but there were plenty of guys ahead of their time from the old days. And some of them had techniques that modern boxers don't have. Take Jack Johnson's ability to parry, and catch punches with his gloves. Guys now days mostly block punches by gluing their gloves to their faces, a high guard. Johnson had a more active defensive system often smacking down punches, catching them with his open hands, or parrying them away. You don't see anyone doing that anymore.