Some albums cross over genres so the labels are more guidelines, sometimes merging depending on how the list evolves.
If I missed anything blatantly important, please tell me.
An ongoing list, please stay put!
Rock / Prog / Heavy
Dark Side of the Moon by Pink Floyd
The Wall by Pink Floyd
The Doors by The Doors
L.A. Woman by The Doors
Led Zeppelin IV by Led Zeppelin
Hunky Dory by David Bowie
All That You Can't Leave Behind by U2
Songs for the Deaf by Queens of the Stone Age
Alternative / Post-punk
Is This It by The Strokes
A Rush of Blood to the Head by Coldplay
Elephant by The White Stripes
Beautiful Freak by Eels
Odelay by Beck
Demon Days by Gorillaz
OK Computer by Radiohead
Blur by Blur
Grace by Jeff Buckley
Unknown Pleasures by Joy Division
Metal / Hardcore / Industrial