There are other amazing metal bands from the 80's (like W.A.S.P., Iron Maiden or Candlemass), but they weren't part of the same metal movement and so that's why they didn't found place on the list.I am going to update it, so keep looking around.
I hope this is going be useful for you, enjoy it and stay heavy!http://img836.imageshack.us/img836/9643/band.gif
"Metal rules, if you don't like it - die!" Paul Baloff
Abattoir (USA) - The Only Safe Place (1986)
Abattoir (USA) - Vicious Attack (1987)
Abomination (USA) - Abomination (1990)
Abomination (USA) - Tragedy Strikes (1991)
Accuser (Germany) - The Conviction (1987)