Current Sugar Shane - Got every attribute I look for in a boxer, and takes the fights nobody else would take, often to his detriment All time Probably Frazier or Duran
Rocky Marciano - The fiercest, most determined, dedicated, and relentless fighter that ever lived. A fighter with no concept of losing. Unending will and stamina with terrific punching power. My runner ups would be both Muhammad Ali and Joe Frazier. Both obvious reasons.
Muhammad Ali - loved his foot movement in his prime, his defensive reflexes, his boxing brain, his determination, his confidence/arrogance, his combinations, his jab, his right hand counters.... even his interviews. He basically defied human logic by moving the way he did at 210 lbs, his performances vs Liston 1, Williams, Terrell, London (see below), Folley, Quarry 2, Foreman, Frazier (all 3) & Shavers were all stuff of legend. There were other very good performances too like both Chuvalo fights, Ellis, Norton 2 & his earlier ones vs Moore etc, his olympic fights showed he was pure class at just 18 as well but those ones I first mentioned stand out to me the most. :good
mike tyson- this guy's fighting style and punching power was almost frightening to watch, never have i seen a HW that moved so fast and hit so hard with the intentions of damn near killing his opponents. its as almost you felt sorry for just about anyone who stepped in the ring with him,knowing their fate was pretty much sealed. my current favorite fighter, the tuaman. not the most technically proficient HW in the business, but his monstrous strength, inhuman determination, and granite chin make up for any and all of his flaws. without a doubt one of the most hardest hitters that ever stepped in the ring. the fact that he can end the fight at any moment with one big punch makes him exciting to watch.
all time, Guglielmo Papaleo better known as willie pep if boxing is the sweet science then pep was the albert einstien of boxing, 229-11-1(65KOs) is much more impressive then 229 wins with 220 KOs (to me at least) current, Bernard Hopkins another master boxer who seems to be getting better with age miguel cotto is right under b hop, cotto is a throw back in that he fights who ever is put in front of him
Vitaly Klitschko! He has basically developed or even hybridized an awkward fight style that stemed from a kickboxing background. Something that basically all boxing experts claimed could never be done with any real success. All time would be Stanley Ketchel. No explanation should be necessary.