Currently, Queen Elizabeth has very little power within the actual British government, and she is regarded for of a figurehead. During the American Revolution, was King George's powers similarly neutered? For instance, if George had felt like bestowing more rights to colonial citizens could he have done it? Did he or Lord North have more actual power within the government?
Quick clarifying question: are you specifically asking about his power over North Americans, all British colonies, or the British Isles? Because this context entirely changes the answer.