Some Rulers/Heads

 Ruler of the Omniverse (ruler of infinite hyperverses, metaverses, megaverses, multiverses)

 Ruler of the Multiverse (ruler of infinite universes)

Ruler of the Universe (ruler of infinite galaxies)

Ruler of the Galaxy (ruler of a hundred trillion star systems)

Ruler of the World

President of the United States

President of Russia

Head of China

Queen of England

The Pope (head of the catholic church)