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'
@Denezy52 I agree with Captain Beyond, although I think Sufficiently Breathless is a superior album, personally. Also:
Atomic Rooster - Death Walks Behind You 
Audience - House On the Hill 
Illusion - Out of the Mist (original members of Renaissance)

Bald Bill Hagen and his Trocaderons Play Music to Strip By.I heard this on an Infinity Servo Static One system 50 years ago and was blown away. 
Here's a haunting song from a haunting album. The lyrics are just...lovely and creepy. Great sonics too.
Aqualung (no not that one) 'Strange and Beautiful'