Doom, stoner doom, stoner sludge.

Bands like Sleep, OM, Electric Wizard, Weedeater, Dopesmoker, Satans Satyrs, Uncle Acid and the Deadbeats, Salems Pot, Acid Witch… there’s so so many.

Also heavier bands that are more stoner/psych than metal like All Them Witches, Mars Red Sky, Dead Meadow, Aunt Cynthia’s Cabin, all rip too.