It's a difficult one to call regarding Mike Tyson. There's no doubt that those first 5 years where impressive. I don't think I've ever seen a HW fight with the aggression and ferocity that Mike did. I always feel that longevity plays a big part when looking back on someone's career though and sadly, for whatever reasons, be it the death of Cus, Don King, or maybe just Mike not being able to handle all the attention and pressure that comes with being the youngest HW ever, he derailed.

Personally I would put Lewis ahead of Tyson in the all time greats purely for his longevity. Tyson just pushed the self destruction button and he pushed it fairly early into his career. For me its a question of what might have been. Once he lost that aura of invincibility he just became another HW.