Tyson. He was a speed and volume guy, to both head and body. He wasn’t a barbarian bruiser like Shavers, Foreman, Ruddock, Bruno or Morrison.
He was a speed, volume AND power guy, hence why his knockouts were so devastating. He was a complete puncher, unlike some of the other guys you mentioned.
Mike Tyson ? He had plenty of power. Surely not overrated at all. Some should look at a highlights reel. Probably the same people that question his resume question his power maybe. Wilder gets rave reviews for his concussive power, but compare his resume to Tyson’s & that could be an interesting topic.
It's hard to doubt his power seeing his KO of Root. Even though he could never do it against larger guys like Armstrong, and an Old Fitz really took him to school.
Shavers and Marciano. Shavers wasn't able to take out big men very often. And Marciano was more of an attrition puncher.