Queen Elizabeth the First
The most powerful queen in English history
Elizabeth the First may well be the most powerful queen in English history, because she held actual political power in a way that most later queens of England did not. Victoria and Elizabeth the Second had their power limited by the British Constitution to a degree that Elizabeth the First did not. All of them had to contend with Parliament, it is true; but the monarchy still had real power in the years that we today call the "Elizabethan Era." This power was all the greater when the state religion was still under royal control. Just years before this, you see, the church had actually been under the control of the Vatican in faraway Rome. But her father's divorce from his Catholic wife had brought him the ire of the Catholic Church, and led to England's conversion to the new Protestant faith - a faith led by the monarch personally during the lifetime of Elizabeth.
King Henry the Eighth, Elizabeth's father