By "successful" i'm not talking about fighters who fought poor adversity, but those who actually had to face tough contenders. They don't necesseraly have to be champions or ex champions. I was thinking of GSP's legacy and realized that his style of fighting and his invincibility cost him lots of brain damages. In the end, beyond the belt and the wins, physical integrity should come as an important quality for a fighter, not only for his longevity in the ring but for his health when he's retired. Which fighter has successfully maintained his physical integrity, while remaining successful as a champion or as a contender? I was thinking of Silva, whose fight style -not as rough as wrestlers- kept him away from traumas. Aldo also comes to mind, as well as machida, who is one of those who take the least damages with his karate background.