Some of Eduard Artemiev’s scores for Andrei Tarkovsky have a very chilling effect. Especially, perhaps, STALKER. The uneasy synths.
Enya’s AND WINTER CAME, but that’s not a score.
Gabriel Yared’s MAP OF THE HUMAN HEART (1992) deserves a mention. They did an orchestral rearrangement of that for the WSA album, but it’s the original – with the synths alongside the orchestra and organ and what-have-you – that packs a chilly punch.
(by the way, it’s still minus degrees in Oslo, and expected to last for a while yet).