6. Mauricio "Shogun" Rua
Again, casual fans just asked, "He also has a first name?" A Shogun was a general who was like a dictator. In 2005, Shogun's reign over Pride was just like his name suggested. My favorite fighter of all time. Him and his brother were nicknamed "Shogun" and "Ninja" because of their fight styles. He used to be a berserker back in the day. After many knee injuries and a lack of motivation, Shogun Rua just isn't the same fighter anymore. At least he will always have one of the coolest nicknames ever in MMA.