Vampire Arthur Cayley, or even vampire Ada Lovelace, are both too young, with only a couple of centuries of experience. Unfortunately, vampire Gottfried Leibniz would be too old.
I've heard that Newton used to publish work which he'd done with the calculus, but presented it geometrically, so it would make sense to his peers.
Now I'm imagining our vampire at a whiteboard, making geometric constructions with compass and straight-edge, then translating the solution back into algol-y brace-and-semicolon pseudocode for the benefit of the befuddled interviewee...
Either vampire Jacques Vaucanson or vampire Pierre Jaquet-Droz, however, would be the perfect age, and both of them already demonstrated
an unhealthy fascination with animating the the non-quick
the ability to drum up public and private funding to support complex projects
Jaquet-Droz's choice of writing, art, and music were not haphazard; these were the ways in which aristocrats of the XVIII distinguished themselves from the public.