Possession? Well, maybe a little like that, but not as lighthearted or romantic... the tone of the writing is really different and much more similar to the other books I mentioned. Anyway Possession was mostly Byatt's experiment with writing in a ton of different voices, so the point of it was not so much the story but the ventriloquism (a major reason why I didn't like the film version). The Historian only has a handful of voices, and they all know each other in some way and are all academic, so there isn't much reason for any of them to be extremely dissimilar.

At the point I've reached in the book, there is now an actual vampire of sorts, but he's a creepy little stalker who isn't in any way motivated by his "thirst."