Both Mephiston (WH40k: Blood Angels) and Iweko Setai (Legend of Five Rings) are death seekers, but they turned out to become more awesome as they left Death Seekerdom. for backgrounds,
Mephiston is a chief librarian of Blood Angels who used to be a Death Company member who succumb to Black Rage. Now, he managed to suppress it after he was freed from the ruins of building when fighting against the orks. Now, he's one of the most powerful unit in Blood Angel Army.
Iweko Setai used to be a former lion Deathseeker (think Death Company minus the beserker tendency) who is now married to the Empress of Rokugan.
Is there any former deathseekers who managed to get awesome life currently?