Franchises. Action, Comedy, Horror, Sci-Fi. There are probably more than you think and come in all different genres. What's the best in your opinion?
http://www.ranker.com/list/the-best-movie-franchises-ever/dee123,
Batman
Halloween
Hellboy
Indiana Jones and the Raiders of the Lost Ark
Scream
The Godfather Saga
The Terminator
Bourne
Toy Story
James Bond