I recently saw a film called "The Double", starring Eisenberg. In it he plays a Michael-Cera style loser and his double, which is meant to be charismatic, confident, cocky.
I gotta say, while he played the former quite convincingly, I did not feel he had the spark for the second role. It's a controversial choice and it may work out, but my initial reaction is that he doesn't have it in him to hold an audience with his menace.