While I haven't played one myself, I have played Fast Racing Neo on Wii U, which was excellent, and given that FAST RMX on Switch is pretty much the same game with additional content and improved graphics, I feel I can heartily recommend it.

They also tweaked the controls and balancing so it feels better to play too.  Really great addition to the library.

Fast RMX
Shovel Knight
Snipperclips

Thumper. Seriously, this game is fucking amazing. It's like... F-Zero + Rhythm + LSD.

Thumper. It's like having sepsis and hallucinating in a nightclub... Native 1080p @ a rock solid 60fps.

Snipperclips for local co op is brilliant....

Fast RMX, Shovel Knight and Blaster Master:Zero imho. Thumper also looks dope.

Oh there's Zelda and uh oh did you get MarioKart yet?
May as well get out the Super Nintendo other than that.

So far I have 5 games and I will rate them this way!

Zelda
Mario Kart
Snipperclip
Puyo Puyo (a big surprise) so much content
1-2 Switch

I can't say much from personal experience as I've only really played those two games so far, but I did start on Super Bomberman R yesterday. So far it's just okay, the boss battles are terribly lame but I'm sure the standard multiplayer battles should be fun. However, even though I got the game for $40 it still feels like it should be cheaper, so I'd only recommend it if you can find for $30 or less or if you just really love Bomberman.

Probably

Disgea 5 > Fast RMX > Puyo Puyo Tetris > Snipperclips > Shovel Knight (not my cup of tea but others seems to like it). Get that 1,2 Switch shit outta here.

That is the one thing with the Switch library, there isn't really a defacto great "number 3" game yet. There's a bunch of decent games in that slot, but probably nothing that stands out big time until ARMS arrives.