Good, bordering on excellent, suggestions so far, I have a few personal favorites to add. Most of them are from Texas. Shoot me. I’m awful - I’ll probably live. Plus, we have a lot of crazy heavy/psychedelic bands. I could have gone on all night and still have been forgiven. (Hey, pass that damn thing!)
First, the young `uns. What Needs Must Be by Dead Meadow. Everything I’ve heard from them has a great groove, with a great mood. The more I hear of Jason Simon’s guitar playing, the more I think he’s distilled psych guitar when you describe it as “Blues in Technicolor”.
If I omitted my label mates The Fungi Girls or Year of the Bear, it would be out of fear of bragging. I swear to everything that makes you feel the least bit funny in the head that I am not doing some sort of self promotion, they simply rule. They’re some of the best modern stoner/groove/space/psych rock I’ve heard. The fact that I can hear bands like that every few weeks, for the price of a beer at the bar, almost seems like a crime.
And now, for the stuff that’s (gulp) more than a quarter century old.
Jimi(not its real name, its real name is a picture), by the Most Holy Butthole Surfers. Maybe it’s far beyond too heavy or too psychedelic. No one would accuse it of being a half measure. My wife and I both brought a copy of that record into our marriage. She’s incredible.
Hurricane Fighter Plane by the Red Crayola and the Familiar Ugly. Every song begins and ends with a free-form freak out. Even if they’re not your taste, it’s a Psych album that you have to hear if you haven’t yet. Released the same year as both Sgt. Pepper and Piper at the Gates of Dawn, but much more sonic-ally dangerous than either. Don’t expect any of their other albums to be this way, unless “this way” means “in a totally different direction than anyone else”.
The Flaming Lips were an amazing heavy Psych band before they went very pop, One Million Billionth Of A Millisecond On A Sunday Morning is a great example, and everything up to and including In a Priest Driven Ambulance is pretty damn great. A couple albums after that are damn good, too. After that, crazy pop ensues. I like a great deal of it, but it’s not the band that I first saw in '89. That band was heavy, hungry and crazy. Realize, this is a Texan commenting on a band from Norman, Oklahoma. If I said “they don’t suck”, it would be great praise.
And finally, maybe it’s a bit mellow for your aim, but probably the heaviest psych ever is Moon Glory and the Seventh Sun By Light Bright Highway. They were a three piece from Denton that did instrumental Psych. That’s side A, each side is one track recorded live. It takes a long time for a 23 minute song to get going, but when it goes into light speed at around 10 minutes, you’re really moving. It’s a psych jam, but it’s so heavy compared to every other jam band, that the term “jam band” doesn’t even do them justice - It’s Psych improvisation. Every show I saw of theirs was that good, if you see that album, buy it. I’ll never sell mine. Seriously, this record defines “room full of pot smoke” for me.
ETA: oooh, Bo, quarry.