Reed Richards - Zachary Levi
He is great on Chuck, and he can pull off the action while also being a brilliant scientist.Also he could bring a little comedy to the movie.
Sue Storm- Alice Eve I can not really think of anyone else besides her for the role. She is attractive and blonde so she should do well.
Johnny Storm- Kellan Lutz or Robert Buckley. I think both look the part and could do a really good job with this .
Ben Grimm- Adam Baldwin - I think this is by far the best choice for the role. Adam Baldwin would own the role. He is awesome on Chuck and could definitely do very well as The Thing.
Victor Von Doom- Brandon Routh- He will probably not be Superman and he was an awesome bad guy on Chuck. It would be a very interesting role for him.
Namor-Jesse Metcalfe - Looks kind of like Namor and looks like someone that could score Sue Storm.
Sorry no pictures, not quite sure how to do that yet.