The Messenger (a ninja Gaiden style Metroidvania) and Sea of Stars (a Chrono Trigger style RPG)

Blasphemous 1 and 2 are some really fucking amazing Metroidvania games with some incredible pixel art.

Hollow Knight is another gorgeous game that, to me, is the closest thing to Super Metroid in modern genre.

Axiom Verge 1 and 2 are love letters to Metroid actually...

Octopath Traveler is a nice jrpg style game with great visuals that mix pixel art with modern graphics.

Cuphead is a great platform run n gun.

Blazing Chrome is a love letter to Contra.

Huntdown is a fucking awesome platform shoot em up with amazing pixel art set in a cyber punk dystopia reminiscent of old 80s-90s action movies.

And the latest Teenage Mutant Ninja Turtles Shredder's Revenge is a great arcade style beat em up that really captures the old TMNT 4 vibes.

Mother Russia Bleeds is another great beat em up with a great story and ambiance.

The Undertale series is a great RPG series that's worth a playthrough for real. It's so much fun and the story and characters are so well written.

Broforce for complete pandemonium, especially with friends. It's like The Expendables, the game. Except you can destroy everything on the screen.

Towerfall is a great multiplayer challenge game well worth it.

Gato Roboto is a fun game worth playing. So is Under Dungeon. Or Dogurai and Squidlit If you reach to play a more Gameboy style experience.

Flashback, a cyberpunk Prince of Persia style game. It's an oldie but a goodie.

Crypt of the Necrodancer is a great dungeon crawler where you have to follow the beat of the music. It's an amazing game. They even made a Legend of Zelda game based on it. Called Cadence of Hyrule.

I mean there are so many more but those are in my top on the switch.