Suggest one obsure album we all should hear

@soarnatti  beat me to it.  It's a Beautiful Day is one and the others, which may not be so rare, are the white NRPS album, Nilsson Schmilsson, and Heart's Magazine, which has the best version of Harry's Without You ever (turn it UP!)

Cheers!

Johnny Winter - About Blues on Janus Records 1969

Compilation of some of Johnny’s early Blues tracks with some great classics.

"The Loading Zone" was the house band at the Fillmore. Lead singer was Linda Tillery who could really belt out R&B. Last time I checked, she was a gospel singer. The first (of only 2) albums they recorded was on RCA and the recording is harsh and grating and the music has been derided by some critics as "derivative'. Nonetheless, I really like it and it is (or was) available on Tidal.

Anything by "The 13th Floor Elevators" is worth hearing (also on Tidal). The earliest and some of the very best psychedelic rock music and a highly influential band.

"Living With the Animals" by "Mother Earth" (Tidal) is a good example of 1960s "country rock". 

Maybe not too obscure, but "Big Brother and the Holding Company" (cover art by R. Crumb) is an absolute classic. Janis at her zenith.

Osibisa Woyaya album.

There is a song here named "Y sharp" at the end of which has probably the best ever electric guitar solo in the world, starting at 4:25 minute mark in the song. Unfortunately, the recordings are old so quality is not good.  

Artist: Bill Pritchard

Album: Three Months, Three Weeks & Two Days

From 1989, but doesn't sound dated (at least not to me).  Written and performed by an ex-pat British artist, this is mostly mellow, romantic music with thoughtful lyrics and a hint of French influence.