I’m going with Conan because of his experience dealing with creepiest things something that Morticia does in her lifetime and they both have that in common.
To me while Jackie is good but I think that Vampirella has the better chemistry of giving Aragorn a good romance story because of her times fighting against evil monsters like Aragorn does.
Actually you are right that Dorothy with her musical can definitely help her out in Apocalypse and I see now that the Witch was way scary than Kurtz in my opinion.