There's no other way to put it other than to say these people are god damn cheats and people with very low morals. Everything they accomplished means $%#@ because they are cheaters.
You'll notice that I omitted Lyoto Machida from the list because his case is truly unique in that the substance was taken while it was not prohibited, but then a few weeks after, the new prohibited list came out and at that time it was too late because it was already in his system. I didn't leave him off because we are close personal friends. A cheat is a cheat.
1. Jon Jones
2. Anderson Silva
3. Frank Mir
4. Royce Gracie
5. Josh Barnett
6. Mark Kerr
7. Brock Lesnar
8. BJ Penn
9. Junior Dos Santos
10. Ken Shamrock
11. Sean Sherk
12. Tim Sylvia