Thanks for suggesting Riptide Renegade, it actually looks like something I might really enjoy. Here is my list:
Larger-Scale under appreciated titles:
-Xenoblade Chronicles 2: I am still not sure why this series is so niche everywhere. While XC2 is performing much better than its predecessors, I still think the series holds more potential.
-Doom: Obviously not as good as the stationary versions in terms of graphics (and for me these FPS type games still play best on PC thanks to mouse and keyboard support). However, being able to play such a competent port of this game on the go is really amazing.
-FIFA: Yes the Switch version is an enhanced port of the last-gen game, and yes if you are only going to play on TV then you are better served by the other versions. However, this is the best handheld (and yes I am counting smartphone versions) FIFA I have ever played. I have seen this game get a lot of flack as a lazy port, with people wanting EA to take 2K approach and make an inferior port of the current gen version. To be fair, the 2K approach has some advantages like giving you a more modern base game with more features. However, the EA approach here gives a slightly outdated game that exhibits good performance.
Just off of the top of my head I would say Human Resources Machine: I like computer programming and puzzle solving; hence, I really enjoyed this game. I had some other Indies in mind as being under appreciated, but many of their developers expressed that their games sold quite well on the system so I don't think they are under appreciated.