I'm surprised RJJ isn't even on the list. His left hook was fast, powerful and just beautiful. Plus, he could easily throw four or five at a time.
Yeah, all good 'hookers' on that list. Tommy's was brutal. Cotto and Mosley are no slouches in this area either.
Down to his chin, which is daft. He had very good skills and his combination punching was excellent. He had good movement and was physically strong.
SRL and SRR deserve a mention too. Leonards left hook ko of Dave Boy Green was spectacular and Ray Robinson landed the greatest left hook (or any other punch for that matter) on Gene Fullmer. I'm not sure who had the greatest ever but RJJ and both Sugar Ray's would be on my shortlist.