These three indexes of topics in films are very useful, but they are of course limited by their publication dates and the number of films they cover.
Films on a specific character, character type or group are typically in the form [Character]--Drama or [Character] films. The "--Drama" subheading is the proper one, but the reason there may be two forms is that often these are considered a genre (although sometimes the subject heading is applied by mistake).
In many cases you will need to search both forms. "Drama" covers fiction movies, plays and TV shows, including fictionalized accounts of real people or events (to some extent you can limit to films by using the strategies described on the Films & Videos page). These headings may be used for both fiction and non-fiction (documentary) films. For instance, there may be a non-fiction film about the rise of the vampire movie genre.
Films on a theme or event usually have a subject heading taking the form [Topic]--Drama, but there are also related genres (e.g., War films).
Films that are part of a series (or implied series) may receive [Series name] films. A series is usually treated as though it's a genre.
NOTE: Catalogers are not required to apply any headings to films on a particular topicfilmographies