Piet Mondrian. I have this on a Guggenheim Museum poster in my living room. I don't care so much for a lot of abstract painting either, but this guy was really on to something, considering the above was made in 1922. Some abstract painters couldn't draw to save their lives, but he could, and it's pretty cool, if you look at the progression of his work over the course of his career, how he was following his muse, commercial considerations be damned. He was a lot like Beethoven in that respect.