Fitzsimmons Zarate Graziano Briscoe Foster Gomez D. Lopez Langford Cuevas Ketchell KO Chaney to name a few. Mike.
Archie Moore is the best answer. But needing mention are: Bob Fitzsimmons Joe Goddard Pete Maher John L Sam Langford
Crazy thing with Moore is that he was knocking out top guys when he was well over 40 before steroids were a thing. A lot of great names besides his were mentioned, but it seems like all of them that fought into later years had a big dropoff in their ability to score knockouts against elites. For example, Foreman has the big knockout to win the title, but was otherwise seeing a lot of decisions...