Probably JJ for the raw one punch KO power. His chin was shite but if he landed it was basically over except for the granite chinned freaks like G-man and the body snatcher who ended up beating him. McClellan and Benn are hard to separate, excellent KO percentages and brutal raw power. I think G-man was a more accurate puncher, Benn more of a clubber. GGG has shown good power for a long time with his long KO streak. He also has uncanny accuracy and the ability to land the right punch. He's not in the league of the other three bombers.
True but so was Benn's , TBH ,that's (imo) what made Benn's fights so exciting, his mad crash-bang-Wallop style, the humongous punching power from an arguably small Mw , even smaller SMW. Add to that again his fragile chin & boy what a fight night when Benn was on full song! In terms of skill, I think GGG is the most skilled boxer of the 4, then McClellan...Benn & Jackson share it
Jackson didn't have a weak chin at all. Wrongly stopped on his feet against McCallum, after McCallum had been in worse trouble. Benn could be wobbled but never put away.
Jackson left countless opponents literally needing a pillow & blanket. He was never even a fully-fledged middleweight either. Wayne Powell actually looked dead. Eyes wide shut. I know Jackon's power gets romanticized but he did seem to have some kind of abnormality. Steel-like tendons or something. I haven't seen any other boxer get such weight & leverage into his shots over such short distances. He didn't even seem to plant his feet much.
Jackson for me not even a real mw and he had devastating one shot ko power it was scary. P4p the hardest puncher in boxing history.
Went with Benn. G-man smashed the hell out of Jackson, Benn smashed the hell out of G-Man. I'd fancy Benn to smash the hell out of Jackson as well at MW. Overall though, GGG beats them all at MW as he's much more than a knock-out artist, he's a boxer/puncher. Benn's power come up to 168lbs as well, few fighters from MW manage to fetch that power up through the ranks. I agree with Pimp in saying Jackson is without a doubt the P4P hardest hitting puncher of all time. I just think Benn hit harder at that weight(MW) as he was a natural MW/SMW.
Jackson. No doubt about it.. all of them had power but one punch knockout power definitely favors JJ.