I never really saw another fighter quite like Max Schmeling. there might have been many other fighters in Europe with a similar style, but it was pretty much unique at world level.
Michael Spinks was very very unique. I don't think I've seen another fighter fight or throw punches the way he did. Rocky Marciano was unique in the level of success he achieved with such dramatic differences in his strengths and weaknesses. Emmanuel Augustus was unique in almost every aspect.
Perhaps, but he is almost a southpaw fighter, who fights out of an orthodox stance. He uses the right as most orthodox fighters use the left, and he uses the left as most orthodox fighter use the right!
I think Naseem Hamed is a lock for number 1. Oh, DMITRY PIROG who meshed together boxers in history that he studied to form his own weird style: http://boxrec.com/boxer/325260 This content is protected
Thomas Hearns. That height and reach at that weight is pretty rare, but combine that with his speed and then power to boot, that's not something I've seen before.