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.
I tend to like competitive games, but I like my coop games to:
That said, I enjoy Pandemic (a classic), Hanabi, Just One, and Magic Maze. I haven’t really tried heavier ones but I’d love to play Spirit Island some day.
And for very young kids, My First Orchard is great!