Might I be able to recommend Dragon Quest XI S for Switch?
First off, at least from my experience with JRPGS, it's like the best one I've ever played aside Pokemon Black/White and EarthBound, no joke. In particular, the best parts are the first and second acts, which are literally perfect in pacing, how they are written and the kind of themes they discuss. It's extremely well done. However, the third act although having a lot of content drags for a long time and acts like a 'post-game' which aims to stretch out the story a bit. Only play it if you don't mind a lot of battling and you really want to experience the rest of the story, which isn't paramount to enjoying the game.
The gameplay is very traditional turn-based combat which you would see more commonly in something like Pokemon. In fact, Pokemon was actually inspired by the combat system seen in the earlier entries of the series. Another thing to note is it's quite an easy JRPG, it was my first entry in the series and I beat the normal mode dying about 2 or three times throughout the 100 hour campaign. It also has a lot of extra features that can make the game harder if that's what you're interested in e.g. Stronger monsters in the overworld, game over if the protagonist dies in combat like a Persona, banning use of equippable armor etc.
Other than that, it's story and characters are portrayed incredibly well. Each of the characters are extremely likeable too. Personally Rab (has quite a sad backstory), the protagonist (even though he's mute like other JRPG protagonists, the lore behind him is done really well and he goes through a lot of personal stuff in the game without needing to say anything, which was well done) and Sylvando are among my favourites, (especially Sylvando literally the best character in the game). It features a well-written story about grief, loss and forgiveness. The game, especially in the midst of Act 2 can become pretty depressing though, not because it's bad, but because of the kind of stuff the characters go through being genuinely quite sad.
I never mentioned the environments. Stunning! They look really good, especially on the Switch, amongst said environments being incredibly varied. The overworld you traverse feels very realistic in terms of proportions of trees, buildings, grass etc., but still has a sophisticated fantasy element to it. Strictly the ambient symphonic soundtrack of the game is quite good too, but it lacks variance in how the same town theme is used over and over again and the battle themes aren't that good in my opinion (well, at least in comparison to something like Pokemon Black/White's soundtrack the battle themes aren't good). Other than all that though, fantastic game please play it and tell me what you think!
I also suggest the Legend of Zelda: A Link to the Past if you got SNES Online, it's an old game, but the dungeon design is very, very good. If this is anything to go by, I've put more time into Lttp compared to Breath of the Wild (which I think is a good game still) if that's an indication of it's quality.
Now, this game isn't necessarily considered the best thing ever, but one of my favourite comfort games on the Switch is Kirby Star Allies. In comparison to other Kirby games like Super Star, Robobot and Adventure it's not necessarily the most creative or well designed from a critical perspective, but I really like it for it's simplicity. It's a series of very, very, very easy levels with some nice hidden secrets, some ok minigames and like the best part of it Guest Star Allies, where you go through a truncated version of the game with any of the characters (excluding most of the bosses). Also, if you're wanting a more difficult experience, there is the 'Heroes in Another Dimension Campaign' which features some actually challenging level design and genuinely difficult boss fights. However, the game is very short, and it's best played with others via local multiplayer (now you see I never really had anyone to play it with, but I enjoyed it single-player regardless). The game was designed around multiplayer, so it helps if you have someone with you to beat it. I was in a really dark place last year and this game despite the flack it gets really helped me to cope because of it's simple, fun mechanics.
