Banksy

Banksy is an amazing street artist and I consider him a graphic designer. I love the way he uses a medium as simple as spray paint to illustrate heavy social and political topics in an interesting way. Also, I should warn that the first time I saw Banksy's art it blew my mind like crazy so beware. Here are a few really cool designs by him:

 Wow. Just look at that last one a good long time and tell me you don't start to question life's meaning.