Persona 3-5 and Doom 2016 win by virtue of being the only ones I listen to regularly outside of playing the games. Doom is probably at the top, the album version is just incredible.
Honorable mentions go to the entire Zelda and Mario catalog, especially LttP and Super Mario World. They're the nostalgic sounds of my childhood and stuck in my head often, I just don't go out of my way to listen to them.
If you haven't already, definitely give 4 a try. The gameplay isn't as polished, but you can see where everything you loved about 5 came from. And the story/characters are arguably even better than 5.