Difficult but there are lots of 80s albums I consider to be amazing, in fact my absolute favourites of that decade and in order. And it covers metal as well for me since metal was at its best in that decade.
1. Peace Sells...But Who's Buying by Megadeth
2. Flick of the Switch by AC/DC
3. Screaming for Vengance by Judas Priest
4. Mob Rules by Black Sabbath
5. Shout At The Devil by Motley Crue
6. High n Dry by Def Leppard
7. The New Order by Testament
8. Ride The Lightning by Metallica
9. Altars of Madness by Morbid Angel
10. Feel The Fire by Overkill