Animations for environmental interactions could be useful. Stuff like opening drawers, opening cupboards, opening chests, picking up objects from the floor, picking up objects from tables or shelves, putting your hand up against a wall next to you or in front of you, holding up an object (like, for example, a lamp), pulling and pushing objects, opening and closing doors in different ways, etc.
I’d also love to see a nice parkour animation set but the problem with that is creating animations in a way that makes them compatible with as many different potential control systems as possible so that’d be a bit of a challenge.