These are based more on guys I am more familiar with then what guys may be better in reality but I have not seen enough fights from everyone to have those kind of opinions

So they pretty much mean nothing at all
Every one is welcome to post their own top 10 and make comments it may be a good way for everyone to see some guys they may not know about from other orgs that you may think are good fighters.
O yeah they are MMA ranks too
Heavy
1 Mirko Filipovic
2 Fedor Emelianenko
3 Josh Barnett
4 Andrei Arlovski
5 Antonio Rodrigo Nogueira
6 Tim Sylvia
7 Fabricio Werdum
8 Brandon Vera
9 Heath Herring
10 Aleksander Emelianenko
LightHeavy
1 Chuck Liddell
2 Mauricio Rua
3 Quinton Jackson
4 Wanderlei Silva
5 Alistair Overeem
6 Tito Ortiz
7 Renato Sobral
8 Jeremy Horn
9 Melvin Manhoef
10 Michael Bisping
Middle
1 Anderson Silva
2 Dan Henderson
3 Rich Franklin
4 Matt Lindland
5 Nathan Marquardt
6 Mike Swick
7 David Loiseau
8 Frank Shamrock
9 Evan Tanner
10 Chris Leben
Welter
1 Georges St. Pierre
2 Matt Hughes
3 B.J. Penn
4 Diego Sanchez
5 Karo Parisyan
6 Joe Riggs
7 Thiago Alves
8 Spencer Fisher
9 Chris Lytle
10 Drew Fickett
Light
1 Vitor Ribeiro
2 Hayato Sakurai
3 Genki Sudo
4 Takanori Gomi
5 Sean Sherk
6 Caol Uno
7 Frank Trigg
8 Nick Diaz
9 Hermes Franca
10 Jens Pulver