I wrote a Halloween themed Black Sails fic! It’s as canon compliant as any fic where Charles Vane is a ghost can be.
Summary:
Charles Vane is dead. That much is certain. Jack and Anne come to terms with Charles’ death, and with the fact that they can’t shake the feeling his spirit still with them.
Unfinished Business – Chapter 1 – corrielle – Black Sails [Archive of Our Own]