Anybody besides Frank Miller. CURSE HIM FOR MAKING 'THE SPIRIT' MOVIE! CURSE HIM!!!
Spirit aside Frank Miller is a G. NEVERTHELESS, I'm gonna have to go with Moore on this one. The guy wrote Watchmen...and you get to see that crazy blue guy's shmeck...which is the best addition to comic books since color if you ask me.
I never see the Spirit, but I read Frank Miller's other novels such as Batman Returns, Batman year one, and Sin City. I read the Watchman, but other titles credit to him. Like the movie version of Sin City and 300.
Alan Moore, as there is no comparison.
Miller, Daredevil and making Batman the Dark Knight dwarf any other recent contributions to comics...