I'd try Romantically Apocalyptic. It's beautifully drawn, and it's basically the adventures of three (so far, there are a couple of new characters that might join the party) men who have survived the nuclear holocaust. Out of all of them, only one is sane. The nominal leader, The Captain, spends the majority of his time talking to calcified corpses, sitting in destroyed cars and trying to drive them, and sending his two men on incredibly insane missions. Also, he tends to hallucinate everything to be happy and cartoonish. The awesome thing is that these hallucinations are usually drawn by guest artists, my favourite one being drawn by the guys over at Cyanide and Happiness.