The Uninvited (1944)
Was recently on Svengoolie, starring Ray Milland and it's about a haunted house! This seems like a great choice.
https://en.wikipedia.org/wiki/The_Uninvited_(1944_film)
https://www.imdb.com/title/tt0037415/
https://www.youtube.com/watch?v=siqSUaML-Ig
(Only issue is that it shares a title with a riffed film though, also it might not be in public domain yet!)
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