Suggest one obsure album we all should hear


I love when I discover an album that's new to me, and great.Please share one so we can all broaden our musical horizons.

Mine is:
Wishbone Ash  'Argus'
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An excellent live album from an underappreciated musician: 
Taj Mahal - The Real Thing
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Classical - Shostakovich Symphony No. 8, 1973 recording by Andre Previn and the London Symphony, Angel

Rock - The Kinks Are The Village Green Preservation Society (maybe not so obscure anymore?)