Suggest one obsure album we all should hear

The Blasters, their second album entitled The Blasters

If it hadn't already been mentioned (at least twice), I would have said Dr John's "Gris Gris". Great stuff!

Steve Tibbetts' autonomous album (BZZ-77) on Frammis Records distributed by Obscure Music Productions (that ought to qualify it!). "Jungle Rhythm" sounds interesting backwards...

Pink Floyd Meddle

Great thread. Many of my faves already mentioned and several that I'm going to seek out. Here are a couple that I love and are a bit obscure if not really rare.
Hall & Oates - War Babies (not like their early stuff or later pop junk, a real masterpiece!)
October Project - Falling Farther In
Graham Parker - Mona Lisa's Sister
Joe Jackson - Beat Crazy
Stabilizers - self titled
Johnny Winter - Johnny Winter And
The Kinks - Village Green Preservation Society (even if you think that you don't like them)