Apollo Creed had an unbelievable jab lol Holmes like others had said but ALI, Liston and Hagler could through a pretty mean one
Sweet Pea, Quartey, Clay, Holmes. Hearns had a really good jab too. Fast as hell. edit: good to see hearns get some mentions in here. Felt he gets underrated.
IMO, Wlad's jab is incredibly overrated. It's slow, and he mostly just kinda' sticks it out there. The only really good thing about it is that Wlad can sort of turn it into a power-left while it's moving, which catches his opponent off-guard. That's a great technique, one of his best weapons, but the jab itself is nothing special at all. I'll never understand why some people think it is.
Check this out, Ike literally caves Parks face in with his jab. Park never fought again :-( [yt]buOCXeZLf5o[/yt]