Usurper (noun)

1. A person who seizes or takes possession of something, especially power or authority, without legal right.
2. A person who takes control or power by force or without legal authority.

Origin:

From the latin word "usurpator" meaning one who seizes or takes possession by force.

Examples:

1. The king was a usurper who had taken the throne by force.
2. The dictator was a usurper who had seized power in a coup.
3. The company's new management team was considered usurpers by the employees.
4. The military leaders were usurpers who had taken control of the government.
5. The CEO was a usurper who had taken control of the company's resources for personal gain.