Erik Morales & Matthew Saad Muhammad were the two best examples of this. Edwin Rosario was another skilled boxer who often found himself in unnecessary fire-fights. That might be more a case of falling in love with his own power than a passion for grueling brawls though. Shane Mosely Miguel Cotto
Older Marvin Hagler and Manny Pacquaio. Riddick Bowe took so many unnecessary punches given his physical tools and skillset.
Leonard believe it or not. Duran #1 Kalule, a few of his fights before he became champ. Holyfield of course. W.Gomez when he began to realize he had 1 punch ko power. Hearns against Hagler and Barkley.
I don't know if he was actually great, but Cornelius Boza Edwards loved to brawl when he really didn't have to. He gave up his height and reach advantages quiet often.