Glenn Gould did record the complete beethoven piano sonatas... He was quite contemptuous of many of them however. His favorite one was the "les adiex". He notoriously hated the Appassionata, and the Pathetique, and most of the famous ones, as indicated by how little passion he puts into them... He also played the complete mozart sonatas, and a lot of the haydn. He hated mozart because his music did not conform to his idea that all music should be contrapuntal. Anyways... So yeah, his beethoven would not be the first recordings I would want to listen to. I really like Fazil Say, Vladimir Horowitz, Friedrich Gulda, and Alfred Brendel's recordings... I don't know if any of these people have made complete recordings... Kempff, Ashkenazy, and Seymour Lipkin are pretty good as well.