OK, let me just say, I love the shit out of this forum. Responses so far have been SO fucking on point.
Kyuss
See? First reply gets it right. This is the correct answer. This is precisely what should have happened in this thread.
Since most of the best artists have already been mentioned I'm just going to throw down a list of specific songs instead. Just for kicks I'm going to keep this to one song per artist, or else I'll be here all day.
Rock:
Kyuss - Fatso Forgetso
Colour Haze - Peace, Brothers and Sisters!
Om - On the Mountain at Dawn
Dead Meadow - Through the Gates of the Sleepy Silver Door
Moccasin - Ezra's Ghost
Electric Wizard - Return Trip
Black Sabbath - Into The Void
Blue Cheer - Parchman Farm
Acid Mothers Temple - Le La Lo
13th Floor Elevators - Reverberation
Zoroaster - Terminally Charged
Desert Sessions - Cake (Who Shit on the)
Queens of the Stone Age - Infinity
YOB - Quantum Mystic
Masters of Reality - Doraldina's Prophecies
Bardo Pond - Every Man
Sleep - Dopesmoker
Pink Floyd - Astronomy Domine
Ahkmed - Kirrae
5ive - Shark Dreams
Pharaoh Overlord - Transatlantic
Yawning Man - Stoney Lonesome
Witch - Hand of Glory
Bigelf - Salvation
WE - Sulfur Roast Stomp
Under Brooklyn Palms - Tiredness
Eternal Elysium - Splendid, Selfish Woman
UfoMammut - Blind
Black Moth Super Rainbow - Forever Heavy
35007 - Evaporate
Monster Magnet - Nod Scene
Love - Revelation
The Black Angels - Young Men Dead
Leech - Silent State Optimizer
The Ganjas - Let's Go to the Beach
La Ira De Dios - Pobre Diablo
Causa Sui - Visions of Summer
Jakob - Semaphore
Mammatus - The Righteous Path Through the Forest of Old
Blind Dog - Back Where I've Always Been
My Sleeping Karma - Ahimsa
Screaming Trees - Winter Song
Grails - Doomsdayer's Holiday
Hypnos 69 - Burning Ambition
High on Fire - 10,000 Years
Sons of Otis - Way I Feel
Shora - Parhelion
Grand Magus - Ulvaskall (Vargr)
Black Mountain - Faulty Times
Bongripper - Hippie Killer Pt. 2
Boris - Heavy Friends
Earthless - Sonic Prayer
Grayceon - This Grand Show is Eternal
Goatsnake - Heartbreaker
Daturah - Shoal
Brightblack Morning Light - Everybody Daylight
Gonga - Manli Summer
Buffalo - Shylock
The Flower Travellin' Band - Satori Pt. 2
Guapo - Five Suns II
Danava - The Emerald Snow of Sleep
Galacticka - Unsanity
Russian Circles - You Already Did
The Mystick Krewe of Clearlight - Swamp Jam
Pelican - March to the Sea
Orange Goblin - The Ballad of Solomon Eagle
Mondo Generator - Four Corners
Queen Elephantine - Plasma Thaw
Godspeed You! Black Emperor - Providence
Rosetta - Wake
The Psychedelic Avengers - In Which The Mighty Silver Wing Leaves The Solar System, Starts Its Old, Tremendous Metagrav Drive And Jumps Into Hyperspace
Middian - Blood of Icons
ISIS - Wills Dissolve
Karma to Burn - 34
Mensicus - Cusp
All of these bands are worth your time if you want to get stoned and listen to good music. I haven't even started on music made with computers and turntables yet.