All probably been said before by others; this includes some as yet unreissued quad versions. Keep in mind that for most groups mentioned here, other albums (that haven't had multichannel releases) besides the ones mentioned would be welcome as well. I'm also aware of the problems for specific records (e.g. Yes' Going For the One has missing multitrack tapes, Animals being announced by AP in 2018, and now unacknowledged, etc), but this is a WISH List after all:
Roxy Music - Avalon
Pink Floyd: Animals; The Wall (!!!!)
Roger Waters - Pros And Cons Of Hitchhiking
Steely Dan - Aja !!! ...(and all the LP-released quad titles)
Ash Ra Tempel - Seven Up
10 CC - The Original Soundtrack
Gentle Giant - In A Glass House
Yes - Going For the One
ELP - Works I
John Lennon - Walls And Bridges
Mahavishnu Orchestra - Between Nothingness And Eternity [both nights complete while they're at it!]
Focus - Moving Waves
Steve Miller - The Joker
Hayward/Lodge - Blue Jays
Mountain - Flowers Of Evil
Jefferson Airplane - Volunteers
Jefferson Starship - Dragonfly
Hot Tuna - Yellow Fever
Joni Mitchell - Court And Spark; Hissing Of Summer Lawns
Kraftwerk - Autobahn
Modern Jazz Quartet - Plastic Dreams
Renaissance - Turn Of The Cards
Satana - Caravanserai, Welcome...(and all the other LP-released quad titles)
Santana/McLaughlin - Love Devotion Surrender
Frank Zappa - Overnite Sensation; Apostrophe
Tangerine Dream - Alpha Centauri; Atem