It takes some effort to eek out any semblance of a top ten for 1930. As silent films transition to sound, there's very little in terms of horror to speak of. That would all change the next year. This also marks the final year where some of the most notable entries are lost films.
Notable Films sometimes labelled as horror:
The Return of Dr. Fu Manchu, The Cuckoo Murder Case
Notable Films that didn't make the cut:
Will of the Dead Man