Ok. Vincent Valentine, the Crimson Vampire, wielding the triple barrel pistol Cerberus. Cursed as the living embodiment of Chaos.
He's one of the characters that I'd choose.
Here's the full list (in no particular order):
1) Vincent Valentine. FFVII
2) Sephiroth. FFVII
3) Squall Leonhart (Leon). FFVIII (KH)
4) Riku. KH
5) Alucard. Helsing
6) Any of the Belmont family. Castlevania
7) Alucard. Castlevania
Nearly any of the Planeswalkers (2 exceptions). Magic: the Gathering
9) Karas. Karas
That's all for now. I'll add more as they come to me.