Very few of these games do all that much with the sound. Maybe they'll have some stock RPGM music or McLeod. I'd say
iNSight of you for making good use of (pilfered) songs, and
HC2 for making use of sound to enhance the voyeuristic aspect of the game (and the tracks do contribute to the atmosphere and setpieces).
BMO TV now also has a mellow theme that shifts according to ingame factors. What can I say, I'm a sucker for dynamic tracks (if that's what that is called) in any game.