Pound-For-Pound is a figment of the imagination.
What really matters is when a real actual fight happens between two men, who comes out on top.
That's the real Best fighter.

Weight classes were invented because these little light-in-the-@r$e fighters could never beat the top Big Men. With very, very rare exception, the Heavyweight always comes out on top.

A good Big Man beats a Great little man. Way she goes, accept it.

Promoters realized these little half-pints can still really fight though, and that there was money to be generated from them even if they can never beat the Big Man, so they invented weight classes. All these lower-weight titles are consolation prizes for guys that could never be the True #1 Big Dog in All the Entire Sport of Boxing: The Heavyweight Champion of the World.

He is the True King of the Ring.
He sits atop a world talent pool of about 16 thousand licensed professional boxers right now.
Hundreds of them, the Heavies, the cruisers, the light-heavies, the top super-middles; they could kick the $#!t out of Floyd Mayweather.
Only maybe 2 or 3 have a chance of beating Heavyweight Champ Klitschko: the true best fighter in all Boxing.


I'll tell you this: handicap match, 2 against one, Floyd Mayweather and Nonito Donaire versus Dr. Ironfist Vitali Klitschko. Vitali would literally kill either guy with a single jab. Vitali probably craps bigger than Nonito's whole body...