Duran is the most complete fighter we have extensive footage of. His all round skill set was truly amazing. Hagler, Ali, SRL, JCC and Napoles are others. Benny Leonard from what I've read was multi skilled, clever as hell and as tough as they make em. Benny Lynch deserves a mention. His style was a mix of boxing and brawling done athletically and often wildly. He was a great counter puncher with a cute defence and as strong as a bull for his size. He also had a chin of Iron, proven against two fisted monster punchers like Peter Kane.
GGG!!! naturaly a counter puncher, who can school almost everyone, but decides to fight like a pressure fighter just for the sake of the american fans and the money. thats why i want to see him fight ward. then we would see ggg real potential
Andre Ward. He can fight outside or take the fight inside and beat the hell out of you. He can fight dirty or fight dirtier, clearly a lot of layers to his game.
Lol Carl Froch.... Watch the Abraham fight( where most said he would lose a brawl to only out box Abraham the whole fight and controlled the ring), vs Glen Johnson he boxed on the backfoot and didn't need to switch gears, George Groves 2 ( who many said he would lose or duck)he set a really well delivered trap ( which I hope he learns to utilize a trapster mindset more as it will help with his slow speed), Bute fight he straight up brawled and destroyed Bute, it is funny because most big fights he is in he is not the favorite but finds ways to win. He can dig deep like the Pascal fight or Better yet the Taylor fight. Is he anywhere near the skill level of most fighters posted here NO but is he a good HOF fighter yes. He has only lost convincingly to the #2 P4P Andre Ward who DEFINiTLEY deserves to be up here. He also avenged his only other loss To Kessler. It's funny when you see fighters with so much talent and they can only do one thing good and can't adjust and then here comes the limited Carl Froch ho hum.
Michael Spinks was the first to spring to mind. He was one of the best at adapting his style and gameplan to the strengths and weaknesses of his opponent.
I wouldn't say Mayweather or Hopkins are completely multi-dimensional. They all have great skill sets and adapted their styles with age to suit them but at each stages of their careers, they stuck to a particular style that worked. Mayweather of 2014 is a one dimensional fighter because he just fights the way he fights, it just so happens that it's good enough to beat the rest, the same as his style was 10 years ago, it's different to now but he didn't really need to be multi-dimensional, he just needed to be great at where he was at during that time, same with Hopkins. That's not a knock to them, it's a compliment more than anything. Masters of their style they crafted which allows them to control a fight. My definition of Multi-dimensional fighter is somebody who could change from a boxer to a fighter within a matter of seconds, or whatever style they need at that particular moment. I'd say SRL possessed those skills more than somebody like Hopkins or Floyd. People should not confuse multi-dimensional with skill set. You could argue that it's better to be so skilled that you don't need to be multi-dimensional.