The list can grow a little bit for me as well!
1971
1. ALICE COOPER - Killer
2. ALICE COOPER - Love it to Death
3. URIAH HEEP - Salisbury
4. JETHRO TULL - Aqualung
5. BLACK SABBATH - Master of Reality
Alice Cooper is the undisputed winner of this year, and you can consider that a double win - I picked Killer for the first position but really, Love it to Death is equally great, these album started the Alice Cooper band's sound as we know it and they were legendary landmarks in the shock rock genre.
Then comes an oddity for me, Uriah Heep - I never really listened to their albums but I did listen to Salisbury and that album is absolutely great. Not only for the legendary Lady in Black, the whole album is great and protoype of modern metal.
Slightly edged out comes another legend, Tull's Aqualung. And Sabbath, well, I know the album and I do like it, but they're kinda filling up the fifth position just to have a top 5, I only remember at the moment Children of the Grave and Into the Void.
Also, it's becoming glaringly obvious, from the list of absent albums, which bands I never really followed