Best co-op / casual multiplayer games?

So I just bought my girlfriend a PS4 Pro. Before that, we were playing Fortnite day in and day out (because it's IMO the best crossplay game right now). So far we've tried PVZ Garden Warfare 2, Overwatch, Paladins, and plan to get the Handsome Collection / Shadow Warrior 2 / Minecraft.

Any other good recommendations for co-op / casual games? As you can probably tell, every game we've played so far (besides Fortnite, which I am... kind of sick of) is a class based shooter.