Mozart... hands down! That is my subjective view. His music is the most beautiful classical music I know of. I also love Tchaikovsky (most famous for the music in The Nutcracker) and Rossini (most famous for "The Thieving Magpie", which was the recurring piece in the movie A Clockwork Orange, and something I don't like so much-- the theme song to the old T.V. show The Lone Ranger). I like Bach and Beethoven too.