Here are two pieces of art (a beat poem and a hip-hop song) that I really like. They are more on the topic of skepticism than atheism, but I think they are beautiful and express the way many atheists think.
I like pretty much everything Tim Minchin does. Enjoy “Storm” a beat poem that sums up the thoughts I have when I’m in a health food store. I’ve often been “Trapped…in the blinding headlights of vacuous crap.”
I also like pretty much everything Baba Brinkman does. You can also check out his guide to the Canterbury Tales and Evolution. Enjoy the Rationalist Anthem “Off that.”

