Washington only ruled the Atlantic seaboard.
Kamehameha only ruled Hawaii.
Boudicca never ruled the Iceni (the Romans took full power after her husband's death, instead of sharing it with her daughters, and then killed her when she led a revolt).
Theodora never ruled the Roman Empire (Byzantium).
Gandhi never ruled India.
Dido was mythical.
Hiawatha was semi-mythical.