7. King Arthur
We've already had Lancelot in the story and a hint towards his banishment from the royal court as a result of his romance with Queen Guinevere - personally, I think it'd be a great opportunity to see a different spin on the Arthurian legends than already-successful show Merlin. King Arthur could be a vastly different character - given the propensity for the males of Once Upon A Time to end up... well, dead, it'd be great to see what led him to his journey, including tie-ins to the mythology of the Enchanted Forest. Maybe an Arthur-Regina clash could be in the mix? As for casting, we'd love to see an actor with real youth and gravitas portraying Arthur - maybe Lost alumn Henry Ian Cusick? We personally don't think he'd end up with a Storybrooke counterpart but if he did... how about the role of a real estate agent? Lording over land one way or another.