It's not a KO, but I'm convinced this is the best left hook shot ever recorded. Even the camera angle is perfect. Timestamped (2:14 if it doesn't load):
I always loved Tyson's left hook on Carl Williams. Yes, Williams got up, and the fight was stopped a bit early (not that it would have mattered, it would have been over within a few more seconds) but the punch itself was beautiful.
Cardona -Avelar was a left hook wasn't it? Ironically the monstrous Jacksonesque puncher the one being knocked face first spark out. The ref just carrying on counting while Avelar is laid face first with less life in him than a tramp's vest is quality. Either thick as fuck or with a gallows sense of humour.
Not exactly a ko punch but all things considered, it was basically the ko punch of one of the best comeback of all time : Jorge Castro on John David Jackson.
A bit of a stretch to put this in this thread, but that Adams ko yesterday was an insane left hook. And so was Valdez one last we
Neither of these probably qualifies as "the best," but I'd say Dick Tiger had a few honorable mentions in his career: