I'd say Alucard :D
have him eat some pirates and ninjas (If he haven't already) and his army of familiars will be even more badass. The Janissaries, the Wallachian army and the Brazilian police dudes are probably ok, but he should really ditch those peasants -__-
And if he had killed the Captain, he could have a werewolf familiar as well...Too bad he didn't...
Pirate ninja vampire. hmm he start as pirate get sunked on island were is only ninja village without alcohol while he wait for ship(few years) to pass time he started learning ninja skills, when he returned to "civilization" decided to test ninja skills break in random castle there he met vampire girl who thought he was handsome enough to be her plaything and made him vampire. lolz for start of story