If you could buff any Pokemon by giving/replacing an ability what would you do?

I feel like it'd make sense if granbull had strong jaw as an ability as it'd make tons of sense, it's jaw is a prominent part of it's design and is renowned in certain Pokedex entries for having a particularly well developed and POWERFUL jaws and has a lot of bite moves in it's level-up movepool. Would it become super powerful? No but it's attack stat is the only thing it has going for it so it might as well have an ability that boosts its power further.

You guys have any ideas?