Technically he doesn't stay dead but Henry is a ghost for a moment and converses with Hannah so we're counting him on this list. Henry has an ominous feeling and races to Bly Manor in the hopes that he'll be able to save Miles and Flora like he wasn't able to save Charlotte and Dominic. He barely manages to clear his car when the Lady in the Lake grabs him by the neck and chokes him. Hovering between life and death, Henry's "ghost" is given a message from Hannah while Owen does his best to resuscitate him. Owen is successful and Henry is the only person on this list that gets a truly happy ending, living to a ripe old age while being able to see Flora get married.