a respectable mention to names such as archie moore (most ko's) and sam langford (second most ko's) also david tua. who in my opinion is the harder puncher than any of the above mentioned, and probably hits just as hard as shavers. also he carries his power late on
Sam Langford, Archie Moore, Joe Louis, Jack Dempsey and Stanley Ketchel round out my top five, in no particular order.
Jackson at 154 should be on this list without him it's incomplete. But with that said out of these I'd say Hearns.
well thats not a common opinion. Tua has more one punch power than foreman. Tyson was great at stopping fighters, he was explosive but not very heavy handed like a foreman, shavers or a tua.