The artist Shitty Watercolour drew 101 fictional characters as sloths. You know, as you do. Characters from a wide variety of series like Lord of the Rings, Harry Potter, The Office, The Matrix, etc. Great recognizable characters... and Zoidberg. I think these movies and shows would be a bit longer though with sloths as the main characters.
Even more sloth art can be seen at the artist's site.
Via The Mary Sue