Impersonator

It’s commonly acknowledged that I'm the best actor in the world. Name an object, animal, person (past, present, imaginary, real, animated), concept, mood, or emotion—I’ve played it. I've embodied athletes, psychopaths, geniuses, murderers, athletes, artists, kings, superheroes, imaginary creatures. One time I played the concept of pain; another time I played a penicillium mold dying to join with cheese to become the tastiest camembert in the world (you saw the Pixar film—the first-ever animated movie to win the Oscar for Best Picture). I’m at my peak. Also, I don't know who I am, and I'm not sure I ever did.