This chart shows the moral alignments of nine pop culture characters using the Dungeons & Dragons alignment system. Rorschach as Chaotic Good? I think that Chaotic Neutral is more likely. And Neutral Good for John Locke at best.

Top row, left to right: John Locke of Lost, Dwight from Sin City, Rorschach of Watchmen.
Middle row: Indiana Jones, Niko Bellic of Grand Theft Auto 4, Tyler Durden of Fight Club.
Bottom row: Darth Vader, Anton Chigurh of No Country for Old Men, and the Joker.

I'm not sure who's responsible for this chart -- it's been floating around the net. I'll edit with a photocredit when someone claims responsibility.

via Popped Culture | Explanation of Alignment System