The first two pictures and the animal in the bottom right of the third photo, is of a brush-tail rock wallaby (Petrogale penicillata), not a swamp wallaby.
I've been thinking a little about the various subtle differences between the two. One detail that comes to mind is the difference in ear colour. The Swamp Wallaby has dark 'Mickey Mouse' ears while the Brush-tail has a paler pigmentation on the inner ear. Depending on the lighting, the Brush-tail can have dark ears, but generally its inner ear colour looks much paler.