Should you listen to a track by Mr. Zimmer it is "http://open.spotify.com/track/53CxTRm73THL8NuTsNTlUy" From http://www.imdb.com/title/tt0108399/. Even though it is a homage to "Gassenhauer" by Carl Orff, which is in the soundtrack to the classic http://www.imdb.com/title/tt0069762/, it is a very beautiful piece & it sets the mood perfectly.
Ooh I need to watch True Romance again. I really like that song, and the movie is great too of course.
Also regarding Yann Tiersen, I love what he did with Amelie, and I've heard a bit of his other work which is pretty interesting too, but I don't think his music would work very well in a TES game.
Oh, and speaking of The Mission, check out http://www.youtube.com/watch?v=jmax47l2hLU. IMO, this is one of Morricone's greatest pieces. Also listen to http://www.youtube.com/watch?v=MjeG7ZNY2G0 from La Piovra.