Suggest one obsure album we all should hear

Firesign Theater
"How Can You Be In Two Places at Once When You're Not Anywhere At All?"

Not really sure if this qualifies as obscure. Perhaps less known and certainly underappreciated. One of the finest voices ever.

"Greetings From LA" Tim Buckley 
Unfortunately, there is no video from this album, but I did find this gem from his album "Sefronia".

https://youtu.be/LtU-9EMSYu0

Fever Tree - from 1968

Red Steagall - Lone Star Beer and Bob Wills Music (if you can find it)
Swingle Singers - Anyone for Mozart?
Glen Campbell - The Astounding 12-String Guitar of Glen Campbell
George Jones - My Very Special Guests
Koerner, Ray, and Glover - Blues, Rags, and Hollers
Koerner, Ray, and Glover - The Return of Koerner, Ray, and Glover
Love - Love
Love - Forever Changes
The Roland Kirk Quartet - Rip, Rig, and Panic
The Incredible String Band - The Hangman’s Beautiful Daughter
Townes Van Zandt - For the Sake of the Song
John Fahey - The Dance of Death & Other Plantation Favorites
The Fugs - The Fugs First Album
The 13th Floor Elevators - The Psychedelic Sound of the 13th Floor Elevators
The Flying Burrito Brothers - The Flying Burrito Bros
The Flying Burrito Brothers - Last of the Red Hot Burritos

Bartok contrasts for clarinet, violin & piano. Stanley Drucker clarinet, Robert Mann Violin, Leonid Hambro piano.
Bartok records.
the best ever.