After rethinking this list, I've learned that I deserved to get shot in the foot when I realized I forgot Hidehiko Yoshida.
Here's my updated list.
1. Mirko "CroCop" Filipovic
2. Yoshihiro Akiyama
3. Genki "The Neo Samurai" Sudo
4. Takanori "The Fireball Kid" Gomi
5. Quinton "Rampage" Jackson
6. Dong Sik Yoon
7. Hidehiko Yoshida
8. Aleksander Emelianenko
9. Anderson "The Spider" Silva
10. Shinya "Tobikan Judan" Aoki
Honorable mentions: Lyoto Machida, Yushin Okami, Bas Rutten, Kazuhiro Nakamura, Kazushi Sakuraba
Bu Kyung Jung is also making his way onto this list. He is capturing my heart by the minute.
Jung's captured everyone's hearts.