I have a idea, how about a slowed version of Mary's Tape player music from Five Nights at Candy's. I know it's not a FNaF game but it's still a fan game and a decently old one that whether you've played it or not, most people know.
Hey. I know a channel named Fnaf Era which makes melancholic (slowed and reverb) songs from Fnaf and its fan games. Maybe you can tell that channel to do your recommendation.
