Holmes/Wlads jab ... think i prefer Wlads due to the power of it. Only punch you need to win a fight and never get hit back in return.
Lewis jab was quite beautiful too, he showed both control and power against Holyfield in their first fight. Wladimirs jab apparently feels like eating bricks, or so I've heard.
Yeah Lewis had a great jab when he wanted to use it .... more often than not it was more a range finder though and not used to dictate a fight. But yeah when he wanted too it was quite the weapon. I like Wlads though ... its almost a power punch in itself, people always come in thinking they just need to touch him on the chin but after a few jabs you can just see them giving up.
If I could choose ANY punch at all it would be Marciano's right hand. Whoever that hits get knocked out.
Larry Holmes jab. A great Jab may not be as exciting as the other punches, but it is probably more important than any of them. The jab also make all the other punches more effective.