I recently bought switch myself. I was also looking for some hidden gems.
Besides the obvious ones like:Zelda
Animal crossing
MarioKart
SmashI would recommend:Mario Party - it's like Fall guys but you are pissed at few people... not 60.
Baba is You- SUPER interesting indy game. Only good if you don't mind thinking a lot (and outside of the box).
Hollow Knight - just amazing
Hyper Light Drifter -
Ozenfree - if you dont mind slower, story rich game
Sunless Sea - VERY VERY much reading

amazing graphics and atmosphere, but if you do not like to just read and immerse yourself in the world, skip that one.
Darkwood - top-down survival game that just spoke to me

(not much repeatability though).
Darkest Dungeon - after getting used to controls... its just sooo good to sit on the couch and go for it.
edit:
Ring Fit Adventure - damn! exercising in an rpg game! sometimes I was pissed I can't go any longer (no power anymore XD)
If someone has any other recommendations, I would love to hear them myself

gl dude
This post was edited by Marioosh on Aug 17 2020 01:48pm