The Sandman and its spinoffs by Neil gaiman, including Lucifer by Nick Carray (not sure on spelling). V for Vendetta, The Watchmen, or anything by Alan Moore. Anything by Joe Sacco if you want to be depressed at how bad the world can be. Masashi Tanaka's Gon is all pictures, but balls to the wall awesome (you'll know why when you see it). Age of Reptiles. The Dark Night Returns.
There's a lot.
