I mean what 2017. makes very strong for Switch are Zelda BotW, MK8D, Splatoon 2 and Mario Odyssey in 1st 9 months of Switch life span,
while in 2018. Switch did have more more and stronger 3rd party games.

Saying that, 2019. will generally be strongest so far for Switch, from 1st party and exclusives Switch will have plenty of different type of good/stronger games, while looking from 3rd party point of games, 2019. should be much stronger than 2018. was.