The only reason why I don't own Skyrim on Switch is because I've already purchased it on PC, PS3, PS4 and PSVR. If you haven't played it yet that's definitely the game you should get. All of those games are great though. But Rocket League would be my 2nd choice.
Fire Emblem. Not really wanting RL, Bayonetta is meh, and I've played Skyrim so much on PC I see no reason to play it on Switch (ecspecially seeing as I can't get the unofficial patches and such).
In my opinion I would skip FE Warriors. I bought it on release and still can’t get the draw to play it. It’s very repetitive and you acquire heros faster then you can level them. Meaning more repetitive. If those were my options of purchase it would be Bayonetta since you get 2 games for the price. But Skyrim would keep you going the longest. Ok that’s my two cents. Have a great day!