I nominate
The Return by Walter De La Mare.
De La Mare was enormously popular in his day--especially as a poet--but aside from a few poems, his work has faded since. Yet he was a very fine writer of short stories and novels which explored the strange twilit world of consciousness with remarkable beauty of language and sensitivity. Nor did he ignore the darkness of nightmare.
The Return is available in the public domain and there is a copy right here in the Mobile read library.
https://www.mobileread.com/forums/showthread.php?t=16822
There it is described as follows:
"Written in 1910, this poignant tale of psychic possession concerns a Mr. Arthur Lawford, who appears to have been possessed by the spirit of a long-dead 18th-century pirate.
One of de la Mare's finest occult stories, the novel also deals with domestic trauma, unrequited love and philosophical reflection--all blended into a seamless whole."
I haven't yet read it (in fact, I only heard about it recently} but I have read a great deal of De La Mare generally and this obscure novel certainly sounds like vintage material from this now-neglected writer.