Arcade Fire, The Funeral
Supposedly, this is all Spike Jonze listened to when writing the screenplay for "Where The Wild Things Are." I bought the album unaware of any of its connections with the film until I heard "Wake Up" and recognized it as the song on the commercial trailer. I had heard other singles from the band, including Intervention and Keep the Car Running, and waited way too long to buy The Funeral.
I was surprised to find out there are like 12 band members in Arcade Fire playing guitars, whistling, banging pots and pans and what have you; yet, it is surprisingly well-orchestrated its complexity only adds to the sound.
Go get this album if you don't already own it.