The debate about MMA's finest fighters ever has, is and always will provoke discussion among fans. Much of the debate circles around who is the best "pound for pound" fighter of all time.
These arguments are interesting and thought provoking, but are ultimately speculative, as there is no way of really knowing who would beat who if they could make weight for a fight.
Debate about the all-time best in each weight class is a little more subjective. Most of the fighters considered will have fought each other at least once, so more definitive conclusions can be drawn.
Without further ado, I present my all time best mixed martial artists in the lightweight to heavyweight divisions. This is just my opinion, feel free to comment and get a debate going. Enjoy!