Suggest one obsure album we all should hear

+1 for  Batdorf & Rodney

As requested by the OP, I will only list one even so I have at least a good dozen that would beat the pants off the likes of Fleetwood Mac Rumors and Steely Dan Aja as far as audiophile quality goes.
Kevin Ayers- Diamond jack and the queen of pain.

Check out the first song on the only album Solid Oak by Top Drawer. Wicked good! Rest of the album is so so. 

https://m.youtube.com/watch?v=HB4ensVdcFQ

Al DiMeola - Land of the Midnight Sun (1976)

"Live at the Bill Graham's Fillmore West" featuring Mike Bloomfield, Taj Mahal, Nick Gravenites etc. (One of my all time favorites except skip the song "Oh Mama" because Bloomfield's singing is as bad as his guitar playing was great)

Magazine's "Play" album

"June 1, 1974  Kevin Ayers- John Cale-Brian Eno-Nico"