Oh, well, Dorian Gray comes to mind.
Dracula, of course, and Frankenstein.
The boys from Lord of the Flies (at least the main ones, Ralph, Jack, Piggy, Simon and Roger)
Um, Lestat from Interview with a Vampire
Hannibal Lecter ("Hello Clarice"...
)
Let's see...I haven't just sat down and READ a book for the heck of it in AGES...I'll get back to you with some more...
“…Judge not what a man has done, but judge what he could have done if he was a different bloke altogether. For art thou a leper? And a leper can changeth his spots…” --Rudy Wade, Misfits (Series 4, Episode 8)