Out of the clearly Acid Mothers Temple & the something something-inspired, over-the-top heavy psychedelic rock bands I've heard, I find Dope Purple from Taiwan one of the absolute best.
Not that I have heard that many. Their label mates, Hibushibire (who was even produced by Makoto Kawabata), are also very good.

Grateful End, by DOPE PURPLE
4 track album