Agreed with GNR, George Harrison, Violent Femmes, Television & Amy Winehouse (which I assume was "Back To Black"?)
You're all mostly wrong about the 'best' part. My takes on those artists mentioned:
* Michael Jackson - Off The Wall
* The Sex Pistols - The Great Rock 'n' Roll Swindle
* Magnetic Fields - Holiday
* The Clash - Give 'Em Enough Rope
* John Coltrane - Om
* Radiohead - Kid A
* Buzzcocks - Another Music In A Different Kitchen
* Cheap Trick - Dream Police
* Motorhead - Overkill
* The Strokes - Room On Fire
* ZZ Top - Tres Hombres
Don't know enough about Allman Brothers.
The answer is : 4th album by Led Zeppelin
(ok, there are a lot of answers. I just wanted to argue and stuff.)