Earthbound and Mother 3 could be exactly what you’re looking for. There’s just nothing quite like them OST, story, and gameplay wise.
Little Nightmares and Little Nightmares 2 also have excellent music that perfectly complement their soul-squeezing visuals and gameplay.
Portal 2 has very little music but it is GOOD, and perfectly timed to key moments in the story. Also top notch unique gameplay, obvs.
Skyrim music is iconic for a reason.
https://off.fandom.com/wiki/Downloads’s music is similarly iconic and its story and visuals so unique and engaging you’ll likely forgive it for being unapologetically RPG-maker. The latest English translation (3.0) is considered the most faithful to the original French.
https://store.steampowered.com/app/243220/FRACT_OSC/ is a “musical exploration game” where you directly influence the soundtrack by interacting with a beautiful, surreal puzzle landscape with Tron-like visuals.