You could put them in whatever category they're most known for. Example: Ben Affleck and George Clooney would be put in the Actor's Filmography series whereas Tim Burton and Wes Anderson would be put in the Director's Filmography series. Also, some people (Christopher Nolan) have never acted in anything. It would also be a good idea instead of doing Director's Filmography you could Filmmaker's Filmography (or something like that) so you could include directors, screenwriters and producers if you wanted. For instance, Jerry Bruckheimer or Kevin Feige.