Godspeed You! Black Emperor (all of it, the random rants don't count as vocals)
As well as most Post-Rock, as most of it doesn't include vocals
Miles Davis, particularly the "Bitches Brew" album
Jeff Beck's "Blow By Blow" album
Everything by The Mahavishnu Orchestra
Other Jazz Fusion as well
Some soundtracks, particularly anything by Joe Hisaishi.
Most electronica as well, like Aphex Twin, Squarepusher, Venetian Snares.
Edit: Oh, I forgot, another one is pretty much all of Karl Sanders' (of Nile fame) solo album Saurian Meditation, all of it is awesome instrumental music based on traditional Egyptian styles. All is instrumental except for a bit of background growls (sound like tortured spirits) and some spoken word verses on one song.