I think this superhero and villain alignment chart is particularly good.
It takes the old school Dungeons and Dragons alignment scale and uses heroes and villains to populate it. The rest is that old D&D geeks get a kick out of the retro chic and the newer native geeks get an easy way to see how the scale works.
I think the choice of heroes and villains are good. Rorschach as chaotic good and Lex as lawful evil make perfect sense.