Dracula. Why? Because Bram Stoker was hardly a destitute bum. The guy worked with a famous actor, knew the American president, and was a fairly notable personality. He had plenty of money to live comfortably, and had a wide and varied career. Once you have that, the difference between quite comfortable and rich is pretty un-noticeable.
I wouldn't ever write something like Twilight. Oh don't get me wrong, I would write a horrible, trashy book with 0 redeeming value that would make Stoker roll in his grave: If people like it enough to give me money, hell, who am I to judge someones taste? It doesn't have to be a cultural revolution to be a fun read worth killing a few hours. I wouldn't write Twilight because it is a veritable how-to guide to emotionally abusive relationships that teaches very young children to define themselves entirely by their man, valued only for their virginity, and basically be a passive, pretty airhead. I couldn't live with that on my conscious. I like women too much to insult them like that.