laugh if you will but i feel overall frazier was the harder puncher. yes dempsey was smaller but taking into account they were both heavyweights, frazier fought better opposition and knocked out opponents with single punches more than dempsey. both were tremendous punchers but jack sharkey himself than that dempsey's effectiveness was his aggression. he seemed to rely on volume and furious anger rather than power.
The same thing can be said for Tyson, Foreman, Liston, etc. They all had one-punch power but more often they had to knock the guy down more than once.
Dempsey was a very powerfull puncher. His hook was incredible but he could punch with both hands. Jack had heavy hands. Marciano was the better one punch fighter but Rocky would punch the arms and shoulders and collar bone and break you down with stamina until he broke your defenses down and could land his power shot clean. Marciano's fights vs Walcott, Charles, Layne,Louis,Matthews shows the 2 fisted power and how he worked his way in for the KO but not in a rush like Tyson but Tyson only KO'd a man 1 time after the 8th, Lewis never did, Marciano was begining to warm up around the 8th. Dempsey was another fighter who liked to punch the HEART,the kidneys, the liver, the collar bone. I think his Ali like stardom hurt him along with the inactivity but Dempsey had a better one punch hook than Frazier. Joe had to work you with it and it was more dramatic but Dempsey's was a killer punch. I think Marciano had the best killer instinct of the 3 but Dempsey and Frazier were no slouches. Remember Frazier had only 26 fights going into Ali 1 and the sudden fame and partying was hard to come back from, that is why Joe had the shortest prime of the swarmers
I think Dempsey's chin might be somewhat overrated, but his punching power was certainly at the top level.
I do personaly. The observations about Dempseys efectivness at finishing oponents being down to speed and delivery are verry sound. The observations about him scoring multiple knockdowns are not in some cases. The fighters in question were somtimes verry durable and got knocked down multiple times in the early rounds where knockdowns do not usualy take place. I still think Dempsey had scary power. He broke Bill Brennans ankle with a punch that hit his body. I think Earnioe Shavers did something similar.
Who are we refering to, the Wllard bout ? Prior to Dempsey no other fighter even ever knocked Willard down. Jeff had an iron chin and was thought to be unhurtable. Jack Johnson pounded him for the first ten rounds and never made him blink. Look at Dempsey's icing of Morris, Fulton, Brennen, Sharkey, Carpentier, Firpo ... the guy's power was exceptional.
The best people Marciano knocked out were pushing 40, Dempsey fought in a era where fighters were smaller gloves not to mention out of Dempsey 60 or so odd wins roughly 30 if his opponents had no wins. Foreman knocked out world class fighters in their prime.