Suggest one obsure album we all should hear

I have a few but to narrow it down: Al Stewart- Past Present and Future. This is an earlier stage album when Jimmy Page was still doing guitar work and Alan Parsons was entering the frame and it's rich in historical reference and just incredible every listen. 
The Church- Heyday. Just before their commercial success and it's an album that keeps rewarding you with sonic bliss over and over.

The Nice Ars Longa Vita Brevis Their best record amazing prog rock.

Beat the Champ-- Mountain Goats

stilljim and Reubent, I must agree.
I bought Puzzle when Dizz Knee Land was getting limited airplay and was blown away by the shear number of great tracks, SQ and great engineering.
I’ve been trying, unsuccessfully, to get it on vinyl as well.

More obscure than Puzzle:
Toy Matinee: "Toy Matinee"

Lot of good tracks.
Best known for:
https://youtu.be/6MN0V4Te94k