I said "at some times" Lennox Lewis. His two losses are his biggest examples, at times he was lazy. Just defending my pick.
Michael Moorer Roberto Duran @ 154 Rocky Juarez Jose Luis Lopez Wilfredo Benitez Odlanier Solis Naz Pre-Garcia Pavlik
Zab Judah is a crazy option. How many times has he held a title now? More times than he certainly deserved! In strict achievements, I'd go for Ken Norton and Earnie Shavers.
Ayub Kalule did well but since I've started to research him,I've discovered just how good he was.Really had the ability and downright awkwardness to achieve more than he did.Although you could argue he did just fine but I'm of the opinion he was a superb talent who should have took more out of the game.