Kailey,
The early Tyson was different than the tyson we know today...heart is all he had in the beginning. I suggest watchi.ng only his really early fights. Of note many boxers stay in the game too long and suffer some damage.
Since you didn't say heavy weight I would go with Pac man and Marquez...both are getting old.
PS when its too late they will be sad they never fought eachother...pacman and floyd. Its almost too late now as pacman has lost a step.
Teodor echoed my thoughts, thumbs up to both of the above answers, I agree that Tyson was way overrated.
Sadly, NONE.