Things I noticed while playing Diablo II with Winamp in the background:

1. “Simian Acres” would make a good theme for the barbarian.
2. The “Angel City” themes from Blast Corps works well for the Assassin.
3. “Command & Conquer Prowl Redux OC ReMix” fit well with the Claw Viper Temple.
4. Perfect Timing: “Hey, it’s Tip Tup!” from “Tiptup Terror” just as Diablo appears.