Aja
Dark Side
Kind of Blue
Too easy. A better discussion if you are trying to discover (to some degree) under appreciated albums for a 100 must have list is to ask for 10 albums of a specific type: pop/rock, classic jazz (acoustic), progressive jazz, big band, heavy metal, classical, etc.
I would have included the following for a top 10 that haven't been mentioned (my apologies if I missed an already listed):
Cannonball Adderley - Something' Else (a Miles album in my mind)
Steely Dan - Royal Scam
The Who - Quadrophenia
Jackson Browne - Running on Empty
Alan Parsons - I Robot
Traffic - John Barleycorn Must Die
Boz Scaggs - S/T
Bill Evans - Portrait in Jazz
Pat Metheny Group - S/T
Springsteen - The Wild, the Innocent and the E Street Shuffle