Which "cavemen" are you referring to? Size matters on a case by case basis. You have to make the argument that Marciano can't handle bigger men. The bigger men he fought he beat.
N. Valuev was only ever called 'sugar' humorously. Less extreme examples which spring to mind include I. Barkely at 160 or A. Margarito at 147. This isn't the first time I get the impression you are asking me to explain something when you already know how I will answer.
I just like to know who you are talking about so I can address each case more directly. I'll agree with you about Valuev but his was a combination of being extremely big as well as fighting a bunch of nobodies and has beens. I definitely disagree about Barkely and Margarito. Barkely and Margarito weigh the same as all of their opponents so they have no size advantage there. Having a longer reach isn't always an advantage. Shorter arms allows for faster punches generally. The shorter fighters are a bit thicker at 147 and 160 so that allows them to be more durable than a taller fighter.
Thats absolute nonsense. A 190lb man has the power to knockout another man of any size. Joshua isn't a dancing master or a slick mover, he is right in front of you, the weight in this case isn't the big factor. Marciano is one of the most vicious and relentless fighting machines theres ever been and if he got close to Joshua which is likely he is very capable of tearing his head off and I would pick him too do so, a rough guy like that wouldn't take no for an answer against anyone he can land his shots on. Quick awkward in-fighters like Marciano, Dempsey and Tyson are known as giant killers, to them a larger opponent means a larger target.
It would be an incredibly dangerous fight, for both fighters. People are saying that 41 year old Wlad is dangerous for AJ? No, but a prime Rocky would be. He beats AJ in one shot power. Next to AJ he has a lot of speed. Mobility. Dexterity and agility. Punching speed. AJ has his size. Reach. Balance. Efficient power output with less energy cost. Great punching technique. Dangerous explosiveness. They are both very focused fighters who take their craft seriously. It will be a very messy fight. Rocky knowing that AJ can blow him out any minute will fight at a desperate pace, going for huge overhand rights, and huge lunging hooks to keep pressure on, and to make sure AJ doesnt set his pace, and hopefully land a KD blow. Rocky will get knocked down a couple times from straight rights. He can get up and return the favor with mauling aggression. Or he will try, and get blown out. I think we need to know more about AJs durability to know which one plays out. AJ's key strategy should be to try and keep his distance to he can use his reach for his power jabs and straights. And when Rocky gets in the inside to unload compact fast combos. Rocky can be peppered with punches to the point of really damaging his ability to see and operate. Rockys key strategy will be to get under the jab and land the overhand right. AJ has a tendency to lower his right hand when he jabs going forward. A small man can get under the jab and land an overhand on Joshuas wide open chin. Anyone who says its an easy pick is cray.
He is unproven. Never has he shown the ability to survive a tough fight. Hit him on the chin he goes down in sections. You have never seen him nor will you ever see him in a Manila type encounter where he prevails. In the hwt division this is what historians look for when rating a champion as a ATG. Joshua is 18-0. A nothing.....A nobody as a pro. He does not deserve to be rated as a top ten contender let alone be called champion. (Which he isn't).
The heavier you are, the less effect weight difference has. 100lb vs 200lb is a torture chamber. 200lb vs 300lb is David Haye taking a giant for a stroll.
Brezeale is a game contender. He smoked out Izu, a talented undefeated contender that many people had their eyes on. Joshua crushing him in the 7th was a very very solid victory imo.
"Okolie has neither confirmed or denied it" - you really are deluded old man. When he ducks the question like that it's obvious he sparked him. If it never happened, he would have said it never happened especially being close to Joshua and all these gym rumours coming out about him. Funny, just the other day Joshua said in an interview with Steve Bunce that he "isn't a gym fighter". Basically confirming the rumours himself but putting a spin on it. Anyway, on topic, I think Joshua wins. I think the 60s is the last decade where you can pick the greats to beat some of the modern greats. And I'm not an old timer basher. Today's fighters couldn't live with those from the 80s but cmon man, the eye test tells you all you need to know from the 50s and before.
If this is your stance than you must think Lomenchenco is shlt. And you do realize Joshua is seen as the consensus best heavyweight in the world right ?