Villains in Horror Films

Here is a timeline of famous villains in horror films. You can see that over time that the villains have become fairly normal compared to the zombies and vampires that were common in earlier films. This may be because nowadays a villain is scarier because of the fact that it could be any ordinary person ( e.g: your next door neighbor.) 
Common themes throughout all the villains are:
- masked killers
-children
- supernatural (vampires, werewovles)

- psychological