If the Oscar for Best Animated Picture existed in the 80's...
...I think the results should've be like this:
1980: ???
1981: The Fox and the Hound
1982: The Secret of NIMH (or The Last Unicorn)
1983: Twice Upon a Time
1984: Nausicaa of the Valley of the Wind
1985: The Black Cauldron (don't know what else came out that year)
1986: Laputa: Castle in the Sky
1987: The Brave Little Toaster
1988: The Land Before Time (dammit, that totally deserved an oscar! >_<)
1989: Little Nemo: Adventures in Slumberland
"Mah boi, this peace is what all true warriors strive for!"- King Harkinian