I was thinking of how to go about the whole league in custom form and Mina was the toughest outside of head sculpts. I'm a stickler for looks being "historically feasible", and cheapening out and doing something like the movie or what they did with the gal in Van Helsing are no-gos. Being able to sculpt would definitely help with the lack of good, 19th century-passable parts.
Hyde and Allan would probably be the easiest, Mina definitely the hardest. Dorian Grey could go either way, dependent on how much of a fop you make him.
This sure would make an interesting group custom project, similar to what they do over on JoeCustoms.......