From this list

vampires still has 2 votes...

It's like what I said. Vampires are always weaklings, unable to fight except with their guns.

There need to be a moive where a vampire transforms into a giant, vicious bat-like creature where it engages in lethal hand-to-hand combat with an equally ferocious being.

Can't you just visualize it?

Yeah, I can, it's called From Dusk Till Dawn...Awesome flick.

Alas, I'm not aware of that movie (heard of it, never seen it). But if it shows an actually formidable vampire, then I'll see it ASAP

The vampires are basically exactly as you descried, half bat, half human, and really vicious and cool looking.

Sweet. From what I've heard Dracula is going to be one of those in Van Helsing