Queen – Innuendo
Released February 4, 1991
R.E.M. – Out of Time
Released March 12, 1991
Lenny Kravitz – Mama Said
Released April 2, 1991
Temple of the Dog – Temple of the Dog
Released April 16, 1991
Primus – Sailing the Seas of Cheese
Released May 14, 1991
The Smashing Pumpkins – Gish
Released May 28, 1991
Skid Row – Slave to the Grind
Released June 11, 1991
Tom Petty & The Heartbreakers – Into The Great Wide Open
Released July 2, 1991
Metallica – Metallica
Released August 12, 1991
Spin Doctors – Pocket Full of Kryptonite
Released August 20, 1991
Pearl Jam – Ten
Released August 27, 1991
Rush – Roll the Bones
Released September 3, 1991
Guns N’ Roses – Use Your Illusion 1 & 2
Released September 17, 1991
Ozzy Osbourne – No More Tears
Released September 17, 1991
Primal Scream – Screamadelica
Released September 23, 1991
Red Hot Chili Peppers – Blood Sugar Sex Magik
Releaesed September 24, 1991
Soundgarden – Badmotorfinger
Released September 24, 1991
Stevie Ray Vaughan and Double Trouble – The Sky is Crying
Released November 5, 1991
U2 – Achtung Baby
Released November 18, 1991
Green Day – Kerplunk
Released December 17, 1991
I don't understand why someone would downvote this. That album had more of an impact on music than any of those on this list.