Radiohead – OK Computer
Is there a more obvious choice than 1997’s OK Computer? I think this album is the 1990’s Dark Side of the Moon or Sgt. Pepper’s Lonely Hearts Club Band. It’s an album with almost universally positive reviews and there’s good reason for that. It’s absolutely brilliant. It’s filled with inspired songwriting, performances, and production.
Primal Scream – Screamadelica
This album came out in 1991 at the same time that grunge was exploding in America. While this brilliant psychedelic album mixed electronic music and rock music in exciting ways and took the UK by storm it was almost entirely ignored in the US. Sadly, this album (and the amazing band that recorded it) is still mostly unknown in the US.
Spiritualized – Ladies and Gentlemen We Are Floating in Space
I’m a huge Spiritualized fan and I quite enjoy most of their albums but I still feel like this 1997 album is so great that it’s on an entirely different level than anything else they’ve put out. It’s truly beautiful album that has a timeless nature to it that is extremely rare. Like the rest of the albums on this list, it’s a very psychedelic album (I love trippy music.)
The Flaming Lips – The Soft Bulletin
While I believe that their earlier ’90s work (such as Clouds Taste Metallic & In a Priest Driven Ambulance) is underrated, there is a good reason that 1999’s The Soft Bulletin really put The Flaming Lips “on the map” in a new way. This album took their wild psychedelia and placed it in a more musical context. It’s easily one of the best albums of the last 20 years.
The Olivia Tremor Control – Dusk at Cubist Castle
Really I could have gone with Black Foliage too. They are both fantastic. One of the most underrated bands of all time. If you like The Beatles & The Beach Boys then check these guys out. Amazing stuff. They take their ’60s inspirations (and they are obviously inspired by the best music of the ’60s) and stretch them out in exciting new ways. Amazingly psychedelic pop music.