Yeah, Musosai was quite similar, even down to wondering the land under an assumed name in his younger days to punish evil doers. There is something of a difference of philosophy though. SAM is more about protecting the peace and safety of the people against wrongdoing and evil while DRKs are more avengers. If you look at the 60-70 SAM quests, the antagonist is actually more like a DRK.

I think this thread is progressively turning into a Job questline thread:P