5. Fedor Emelianenko vs. Randy Couture

Its huge draw. The Best Fighter on the Planet vs. The Greatest Champion of All Time. Russian vs. American. Its a legacy fight. One person would be cemented as the best HW fighter of our era. Its at #5 because (fingers crossed) there is still time.

4. Rickson Gracie vs. Kazushi Sakuraba

It should have been put up, or shut up time. Sakuraba was the Gracie Hunter and Rickson was the self proclaimed "best"....