I've tried Arcade Fire and Elvis, but I just couldn't find the appriciation for them. Trust me, I've really tried

My personal list is a tad long:

Squirrel Nut Zippers, Rilo Kiley, Zero 7, SIA FURLER, Pilate, Unbelievable Truth, Soul Coughing, Steadman, Stabbing Westward, Third Eye Blind, MEW, Air, Irish/Scottish, Keane, Camera Obscura, George Gershwin, John Williams, Matthew Herbert, Dead Can Dance, Bright Eyes, Damien Rice, SEATBELTS, Frou Frou, My Morning Jacket, Jem, IMOGEN HEAP, The Shins, Cinematic Orchestra, Royksopp, Sigur Ros, Kittie, Lillix, Magnet, Athlete, Let's Go Sailing, Kasabien, Mint Royale, Ulrich Schnauss, The Eels, Goldfrapp, NICKLE CREEK, Carmen Rizzo, Jamie Cullum, Radiohead, Fidder Fadder &; Diddy Daddy, Smashing Pumpkins, Sting, Turin Brakes, Bjork, Jenny Owen Youngs, Boards of Canada, Jose Gonzalez, Regina Spektor, Eisley, Mozella, Kate Havenik, Lazlo Bane, Leahy, Supergrass, Her Space Holiday, Chemical Brothers, Ashley Mac Isaac, Gotan Project, Ursula 1000, Afrocelts, Iarla Lionird, WILLIAM ORBIT, Massive Attack, Gnarls Barkley, Bitter:Sweet, KT Tunstall, Philip Glass, Kronos Quartet, Tom Waits, Tin Hat Trio.

Plus a few others

Listening to the Ground Control Oracle Dunes track right now. You can get the entire soundtrack from the game (not to mention the game itself) free from the publisher here.

I know it seems odd to promote game music this way, but in-game Track 1 is simply epic. And even better in-game.