Holyfield comes to mind. Also, Rosario maintained a fairly constant little bounce. What other fighters bounced around the ring?
Just posting a Rodriguez fight, as he deserves way way way more recognition for being one of the welterweight greats. You can see how heavily he influenced Ali's style:
Here's his best performance where he outpoints Griffith. All the Rodriguez-Griffith fights were close, but Rodriguez pretty clearly outboxed Griffith in their second fight: