Let's see.
Dracula : I've long wished Charles Dance would play him, he could still play old Drac but it's difficult to tell what make up and a bit of digital trickery would do to make him into his rejuvenated form. Christopher Eccleston could do the job well I think, he has the cheek bones. Maybe Jason Issacs too.
Harker : Guy Flanagan
Mina : Jessica Brown Findlay.
Lucy : Carey Mulligan.
Van Helsing : Stellan Skarsgard
Arthur : Dan Stevens.
Jack : Benedict Cumberbatch
Quincey : Kevin Alejandro
Renfield : Rafe Spall.