Two doors. One leads to Richard Armitage the other leads to Hugh Jackman
Now, don't answer too quickly. Think about this one. It's not one of those "Which of the Avengers would you hit on first" (Which is a trick question because everyone would pick RDJ) but one of the "Which actor from the Marvel-verse you would hit on (after RDJ)" questions. Although, that's a good question as well.
ETA: MudderofCanton just brought to my attention that Armitage IS part of the Marvel-verse due to him being a Hydra agent in Captain America. Pic in case you don't believe: