I would be curious about your favorite coop games. I often find them a big lacking, often being a bit unbalanced. An example is Battle for Hogwarts, where one game can be a walk in the park and another absolutely impossible and rarely is there a balanced match.
Spirit Island is one of our favorite games of all time as well. It is for sure the most played game when it’s just my partner and me. I agree it feels endlessly replayable with all of the variety.
We have also been playing through a homebrewed legacy system for Spirit Island that I found on reddit. Definitely imperfect but still super fun!