Pretty decent bulleted list for a dream. I’m sure pop culture has already generated this idea somewhere. I should add something that didn’t occur to me till I woke up: vampires (at least in 1e) have Exceptional Intelligence.
using this in a game
Sherlock Holmes is sometimes presented as an ally of, rather than a member of, society. A vampire that aligned himself this way would be admirably suited to be a detective. Charm powers, plus the various disguise powers like fog and bat form, plus wolf form so he can be his own Toby the bloodhound, plus exceptional intelligence, equal a pretty implacable pursuer of evildoers. Naturally, there’s a Moriarty vampire somewhere in the city.
Maybe the PCs, not NPCs, are the detectives in your game. You might be interested in a Javert-vampire instead: an implacable chief of police that keeps the PCs and other lawbreakers in line. The city might have passed a law that allows him to feed on condemned criminals. There’s motivation to secure convictions!