I think there is a market for figures in this genre (as bob said) if the theme is followed through and there is a collection to be created.
Examples could be Alan Quartermain, She, William (Brown), Harry Flashman, Toad (of Toad Hall), Fagin, Bertie Wooster, Jeeves and Billy Bunter.
Crossing the pond theres so much in the works of Poe, Twain and the likes.
Cheers
Derek