FF XI: Steiner's Theme and Vivi's Theme.
Most of Silent Hill 2 sound track. Aside the foreboding, oppressive and terrifying, there is absolutely serene and relaxing ones throughout the soundtrack.
In gray territory, but any Low Roar Death Stranding used. I have all the albums on my phone and PC thanks to the game, and sadly the main vocalist/driving force for this music group died not that long ago. He had absolutely beautiful voice along existentially charged lyrics.
A lot of Nier Automata, like Forest Kingdom, Pascal, Main city theme and that way it goes.