Very Special Mention

Paul Bettany is, right now, Vision in the MCU. For quite a while he was the voice of J.A.R.V.I.S. And while Thanos might be after Vision’s infinity stone, I don’t think the actor will part ways with the MCU anytime soon.

This being said, he is more perfect (if I may say so) for the role of John Constantine than any other actor on this list. Sure, he may not be the most talented, but he does look the part. Furthermore, he has actually appeared in quite a few movies with a supernatural angle.

Thus, while nothing could have saved Legion, his role in Priest (another dud) was awesome – if only he had a better script to work with, and if only the movie wasn’t cut to hell before release.

So yeah – Paul Bettany is by far the best actor to bring John Constantine to life in a Justice League Dark movie. But that won’t happen, no matter how many fans believe it.