While I agree that they are in a lot of horror movies, I'm not sure they are in a lot of franchises.

Price has Phibes and Invisible Man.

Karloff has Frankenstein and... uh...

Chaney Jr. has Dracula, Frankenstein, Wolfman, Mummy...

Noted on Karloff and Price. So what do those others have?

Cushing: Dracula, Frankenstein, Mummy, Phibes, I guess Tales from the Crypt...

Lee: Dracula, Frankenstein, Mummy, Dark Shadows (shitty 2012 movie), uh.......

Franchise = Series, more than one movie

The definition can get a little iffy sometimes in regards to certain vintage characters like Dracula and Frankenstein and in your example, Jekyll and Hyde. Like Dracula as a franchise wouldn't include every Dracula movie, but rather Universal Dracula. Or Hammer Dracula. So something like Horror of Frankenstein, even if its kind of a stand alone thing, would count towards the Hammer Frankenstein franchise.

I'm not sure Jekyll and Hyde would count as a franchise since that character is public domain. All the movies I know of are simply adaptions by various companies. 1931 is Paramount, 1941 is MGM, so there's no real connectivity there.

Urban Legend has 4 movies in the series, so yeah. Definitely a franchise.

JLH was hot in those movies...

But yeah, at least 3 Urban Legends. IMDb lists that third sequel under a different title, but at the very least, 3 movies in that series.

I remember in school, people would refer to JLH as "Jennifer Love Huge Tits". I did appreciate those a lot back in the day, but it's funny how my definition of 'huge' has changed over the years.

Good list. Not an actor in these franchises though. Crew members in the most horror franchises could be a whole separate thread.