dominator

/ˈdɑmɪneɪtər/
noun
  1. A person or thing that dominates; someone or something that has control or power over others.
    • The chess champion was a clear dominator in every tournament she entered.
    • In the animal kingdom, the alpha male is often the dominator of the group.
    • The dictator was a ruthless dominator who crushed all opposition.
Antonyms