Really nice article with lots of good shows! My personal underappreciated yet awesome and highly recommended ones from that article are:

- Aomori: Flying Witch: Highly relaxing show with lots of nature.

- Wakayama: Summer Time Rendering: A highly highly underappreciated sci-fi thriller that picks up in the latter half and keeps getting better and better, with an awesome ending. Iirc the show was underappreciated in Japan because Disney+ had exclusive streaming rights when it was airing and it flew under a lot of people's radars due to that.

Also, doing pilgrimage for an anime you like provides a really good motivation to actually visit and explore the place. Japan is quite homogeneous but each place has their own charm.