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.
Seconding Spirit Island. It’s quite possibly one of my favorite board games of all time (and a huge favorite in my regular play-group)!
Even in the base game, the amount of diversity in play styles between the spirits is incredible. It’s absolutely a game that I could keep playing indefinitely and continue to discover new things.