Holmes Quartey Hearns Liston Louis Wlad Monzon Buchanan Laguna Hagler Truth Williams Tunney Conteh This is quickly off the top of my head in order. Its early and I'm sure I missed a lot. Feel free to add.
You have listed some decent ones. Don't forget Ali and Foreman. Although Ali's was more of a stinging jab, it could be accurate. George has set many an opponent up with his ramrod jab. Carlos Monzon, very underrated jab.
All good:good. As you wrote it was off the top of your head. Lennie Lewis had a very heavy one as well.
Buchanan's jab is my all time favorite. I should have written jabs because his did so many different things. So classy and effective.
I have both his autobiography's I like him a lot. He never did and still doesn't take sh#t off of anybody
It's a crime that Bob Foster hasn't been mentioned yet. Foster's jab was a piston. Michael Spinks and Antonio Cervantes also had great jabs, and they haven't been mentioned yet either.