I saw, there were some similar threads through the years. Anyway, I think this is the place for topic like this. Once very popular tunes but more and more neglected during the last two decades and somehow fallen into oblivion. Which are these pre-2000 songs?
I would start with: Shadow on the Wall by Mike Oldfield and Roger Chapman as a singer, released in 1983. This tune caught me hard as a schoolboy in the 80's. I think it was still popular in the 90's.