Go to the NEW FORUM
Here are some of my types:
David Bowie "Low"
Deep Purple "Deep Purple in Rock"
Def Leppard "Pyromania"
King Crimson "In the Court of the Crimson King"
Talk Talk "Laughing Stock"
Here are ten, off the top of my head:
The Clash, LONDON CALLING
Funkadelic, MAGGOT BRAIN
Pink Floyd, WISH YOU WERE HERE
Derek and the Dominos, LAYLA
Talking Heads, FEAR OF MUSIC
James Brown, SEX MACHINE
The Afghan Whigs, GENTLEMEN
PETER GABRIEL 
True Blue. Not a fan of that look, particularly, (the short hair), but what a freakin' ultra-cool shot.
I'd have to sift through some of the list, but that one immediately came to mind (and not just because it's Madge).
David Bowie- Aladdin Sane
Roxy Music- For Your Pleasure
Lou Reed- Transformer
The coolest covers from the top 200 in AM :
The Rolling Stones - STICKY FINGERS
Beck - ODELAY
The Strokes - IS THIS IT
The Stooges - FUN HOUSE
The Ramones - S/T
New York Dolls - S/T
The Mothers Of Invention - WE'RE ONLY IN IT FOR THE MONEY
King Crimson - IN THE COURT OF THE CRIMSON KING
Spiritulized - "Ladies and gentleman we are floating in space."
This is an album cover that leaves no room for mistake of whats inside.
You're right Ako ! The Spiritualized cover is so cool. And what's inside the booklet is even more cool !