The Same Deep Water As You
Quite possibly my favorite Cure song of all time. Atmospheric, moving, depressing, dreamy, dark, and otherworldly all at once. It's the kind of song that gets into your soul. Listening with headphones with your eyes closed the best experience and you can really get lost in it. First listened 29 years ago (what?) and still listen to it today.
If I had to choose a song to die to it would be this one. I don't know what scenario I'd ever be in where I'd need to pick a song to die to? But if I did, and I had to pick, this would be it.