One of the most beautiful video game scores I have ever come across is Jessica Curry's pastoral and haunting soundtrack for Everybody's Gone to the Rapture. Wonderfully thought-provoking and simply mesmerising.
One of the worlds greatest film composers of all time...Ennio Morricone. Everyone needs to see this film, it's beautiful! This melody gets stuck in my head every now and then. I love the way it keeps getting re-presented with a richer orchestration each time it repeats.