Based on definition:
* A benevolent leader: This is the most direct opposite, as a tyrant is defined by their cruelty and oppression, while a benevolent leader is kind and just.
* A democrat: This refers to a leader chosen by the people, contrasting with a tyrant who seizes power.
Based on specific traits:
* A compassionate person: This opposes the tyrant's lack of empathy and concern for others.
* A fair and just person: This opposes the tyrant's arbitrary and unjust actions.
* A freedom-loving individual: This opposes the tyrant's desire for absolute control.
Based on the specific actions:
* A liberator: This refers to someone who frees people from oppression, the opposite of a tyrant who oppresses.
* A reformer: This refers to someone who works to improve society, the opposite of a tyrant who maintains a stagnant and oppressive system.
Ultimately, the best opposite for "tyrant" depends on the specific aspect of their character or actions you wish to contrast.