Answer:
An antonym for tyrant is "Autarch" from the Greek Autarkhos, meaning "self-governing". Autarchism is a political philosophy that upholds the principle of individual sovereignty (liberty), rejects compulsory government (rule by others), and supports the elimination of government rule in favor of ruling yourself and no other. Advocates of this philosophy are autarchists and a society in which everyone rules themselves and no one else is autarchy.