Indira Gandhi of India...know for forced sterilization of her people. Civil liberties and democracy was suspended during The Emergency. Opposition leaders were arrested.
There are plenty of dictator's wives who had power within their own rights. And they were just as bad of not worse.
Mary I, born on 18 February 1516 and died on 17 November 1558. She was Queen of England and Ireland from July 1553 until her death. Her brutal persecution of Protestants caused her opponents to give her the sobriquet “Bloody Mary”. She was the only surviving child born of the ill-fated marriage of Henry VIII and his first wife Catherine of Aragon. Mary is chiefly remembered for temporarily and violently returning England to Catholicism. Many prominent Protestants were executed for their beliefs leading to the moniker “Bloody Mary”. Fearing the gallows a further 800 Protestants left the country, unable to return until her death.