The Avengers and Game of Thrones star, who died this week at age 82, "could play all sorts of people; that’s just what good actresses do," says Robert Lloyd. "But her most notable creations do share certain qualities. They’re intelligent, often the smartest person in the scene. They know their mind. They are unshockable, or if shocked, it is subtly and just for a second — a quizzical raised eyebrow followed by a look that says, 'I know what this is, and what to do about it.' They are bored by inaction, impatient with indecision." ALSO: Riggs' Lady Oleanna was Game of Thrones' best character.