For three years or so, right at the turn of the millennium, Kazushi Sakuraba was the best pound for pound MMA fighter in the world. Coming out of Japan's catch-wrestling tradition, Sakuraba ran off a string of victories that thrilled Japanese fans and won the admiration of MMA fans world-wide. He beat Renzo, Royler, Ryan and Royce to earn the nickname "Gracie Hunter". He beat Vitor Belfort, Ken Shamrock, Rampage Jackson, Kevin Randleman and Carlos Newton but ran aground against a series of bigger fighters -- especially Wanderlei Silva. Frankly they just kept putting him in against guys too big for him and his kick defense was non-existent.
Here's the HL reel: