There's also the Emissary of a Power type thing ... an ancient dragon, or a half forgotten God. There's at least one Valkyrie running around the place.
You also have scions, people whose ancestry gets .. interesting .. a little ways back.
Or, to give you an idea I originally came up with for an Angel/Buffy game ... my character was a small time thief, who stole an odd looking sword from some old army guys house. What he didn't realise was the sword came from a Marine who had got it from a Japanese officer, who had looted it from a Chinese temple in WW2, and it happened to have a demon bound in it for over a thousand years. The demon, having had a thousand years of Buddhist teachings to listen to, had gone a little strange, and decided to seek its own Buddha nature .. which meant fighting evil at every opportunity. It was still stuck in the blade, but could empower (or possess) the wielder. And now my boy had the sword, he was bound to it too .. damn mystic guardian crap.
He wants a quiet life, his sword wants to fight demons. What's a guy to do?
There's plenty of options out there :)