 I have a friend who likes to call me the most famous artist you've never heard of. Dees has created 25 stamps for the U.S. Postal Service. He's not allowed to sign the paintings, which means he may not be a household name, but his subjects are certainly well known. He's responsible for an impressive gallery of American icons. Dees doesn't choose who's getting the stamp treatment. A citizens committee makes recommendations to the postmaster general, then an art director assigns the work.