Here are some of my favorite Switch games (most favorite first).
Single player: BotW, Axiom Verge, Dragon Quest XI, Octopath Traveler, Dragon Quest Builders, Valkyria Chronicles 4, Mario + Rabbids, Untitled Goose Game, South Park: Fractured but Whole
Multiplayer: Puyo Puyo Tetris, Cadence of Hyrule, Smash Bros, Mario Party, Mario Kart
This all from games that I've played quite a bit. There are still plenty of games that I want to pick up but haven't gotten around to yet.