No, it's not The Old Dark House.
Like the previous question (The Black Cat), this movie shares a title with a later movie, but the later film is not a remake.
The movie in question is from the 1930s, the later movie is from the 1960s.
I left hints about 4 of the supporting players:
#1 also appeared in a Christmas classic (some would argue the perennial Christmas classic).
#2 amassed over 400 film and TV credits (he has an animal last name).
#3 was a former beauty pageant winner who appeared in movies opposite a horror icon (including this movie).
#4 also appeared in one of Swithin's favorite horrors (think mariphasa).
This ain't that tough, folks. It's a fairly well-known 1930s horror movie.