The great John L. Sullivan?

Sullivan wasn't trained like the rest of those guys so he'd probably lose pretty quick. Quarry would probably be too drunnk to get off the couch so that takes him out of it. I say Marciano and Liston, Foreman and Max Baer are the 2 final fights with Dempsey quitting to finish watching the football game. Foreman lands a hard punch on Baer sending him through the living room window while on the other side of the yard Liston and Marciano are trading punches and Marciano eventually goes down. Liston slips in the wet gr and hits his head on the cement, knocking himself out. Thus making Foreman the champ.