Surviving "Game of Thrones" as an Actor

Sometimes an actor is so fixed to an distinctive role over quite some time, so that you can not forget this special role when it comes to a new role, she or he will play. In the case of "Game of Thrones" some actors were that special, one can't ever forget them. Which "Game of Thrones" character is so enduring that you will always immediately think of them, whenever you watch its actor in any other role? Discuss here. A special thank you to urbanemovies.