Ioan Gruffud as Lancelot in "King Arthur" (2004).
Screenphiles Has A Few Thoughts …
… on which Hollywood actor would be best suited to bring Marvel Comics’ hero Dr. Strange to the silver screen. But actor Simon Baker (“The Mentalist“) is not one of them.
Here’s what they have to say:
“According to Collider, some say that Simon Baker, of “The Mentalist” would make a good Doctor Strange. While I am sure that he could handle the role–after all, he’s a decent actor–there’s no way that he is a good fit for the character.
Mainly because he looks nothing like him.
In the past, I have suggested Ioan Gruffudd, because he has experience working with Marvel (he played Mr. Fantastic in “The Fantastic Four” films and we have seen that Marvel is not above using actors from one of their films in another, witness Chris Evans) and most importantly, he actually looks like the good Doctor.”
Gruffud, a Welshman, played Reed Richards in the “Fantastic Four” movies. And though it was a critical and commercial flop, he made a terrific Lancelot in 2004’s “King Arthur” starring Clive Owen and Keira Knightley. He’s dark-eyed and dark-haired and has just the right amount of mystery and danger to play the Sorcerer Supreme.
The Cineaste's Lament. 
Thanks for helping to spread the word about Ioan Gruffudd. While I didn’t see “King Arthur,” despite it being directed by a favorite director of mine, Antoine Fuqua, I believe that Gruffudd didn’t get the attention he deserved in the Fantastic Four films.
That being said, I have to continue to emphasize that he looks JUST LIKE DOCTOR STRANGE, though it doesn’t hurt that he can also act.
That’s not to say that there aren’t others that could play the role, but Gruffudd is, visually speaking, the best choice (so far).