Out of this gen's games I've played, currently all my top 3 entries are Nintendo related:
1. Mario Kart 8. So much brass, it's great. So many tracks are amazing; out of the new ones, Mount Wario is my favorite, and out of the classic ones, probably Rainbow Road (N64). Also absolutely love how the single Animal Crossing tune gets remixed to sound, uhhh, "seasonal" (with the Winter variant being my favorite; that Christmas-y jingle at the beginning, ooof). I actually imported the soundtrack CD from Japan, and it's one of my most prized gaming-related possessions.
2. Legend of Zelda: Link Between Worlds. This one is a bit unfair because a majority of the tracks are remixes from Link to the Past, so technically those compositions are not new. But, Link Between Worlds was my very first Zelda game, so it was new to me, and it was an 8th gen game; in fact, it's the game that made me pull the trigger on a 3DS to begin with. So, I will count it here.
3. Super Smash Bros. Ultimate: Someone in this thread already talked about this, but this one is almost a bit unfair, since it's essentially a celebration of video game music for practically the entire existence of video games.
I love playing Western-made Third Person Shooters (e.g., Uncharted, neo Tomb Raider, etc), but man, their soundtracks suck. I can't remember a single tune from any of those games. I guess the Hollywood-style symphonic arrangements are a bit too vanilla for me.