They were 5 spontaneous picks in no order. Mhmm, hard to say who I should pick, I would put Galaxy at 1st, Murphy at 2nd, Hagler at 3rd, Pacquiao at 4th and Moorer the 5th...
Pound for pound maybe not that much because he's very big, but Corrie Sanders packed a huge left hand although part of it's effectiveness also came from the handspeed.
I don't know much about him beyond his fearsome reputation as a puncher, but George 'KO' Chaney was a southpaw and based on his rep, at least deserves a mention in this thread, I would think. At least Boxing Illustrated would thinks so anyways, considering that he was rated as their choice as the 4th hardest p4p puncher of all-time in one of their issues from back in the early 90's.
Hagler a southpaw... A converted right hander, I would say he was more of a switch hitter, but I can understand why people call him southpaw. But in that case Naseem deserves a place on the list as well IMO.
I can't help but think of Andy Ganigan and Marvin Johnson. Pops sent Galindez to the deck for the first time in Victor's career. Ganigan's straight left to the body essentially ruined O'Grady's. I do think Hagler had the hardest jab of any southpaw. Rolando Navarrete comes to mind as another southpaw who could bomb away, especially with his right hook. (His right hook to the body was the key punch in flooring Arguello.)