Haha, both >>4 and >>5 have great taste =)
My favorite artists are Solar Fields (Mirror's Edge), Jeremy Soule (Oblivion and Prey), Inon Zur (Fallout 3, Prince Of Persia - Crysis wasn't as good), Jesper Kyd (Hitman, UT3), Angelo Badalamenti (I know he's not a game regular, but the Fahrenheit score is out of this world), Alexander Brandon (Jazz Jackrabbit, UT Classic), Sonic Mayhem (Quake 3, Hellgate: London), Adam Skorupa (Painkiller).
Of course, there are classic songs, like Grabbag by Lee Jackson, and all the oldies but goldies (Mario included).