I love posts like these, because I end up finding stuff in there that I haven’t heard / got around to hearing yet. I’m going to sit down and compile my own list, but for now I’m going to add comments to your list…
1970: Led Zeppelin - III - This was the first Zeppelin album I ever heard - to this day one of my favourites
1987: Def Leppard - Hysteria - Heard it when it was released, melted my ears.
1991: RHCP - Blood Sugar Sex Magik - Every student in London had a copy of this, it was required listening
1994: Megadeth - Youthanasia - Changed my life the second I heard it
1997: Radiohead - OK Computer - I defy anybody to listen to the first track and tell me it isn’t one of the best produced and mixed tracks ever