Emphasizing absolute control:
* As absolute as a dictator's rule.
* Like a lone wolf, ruling without consultation.
* As inflexible as a steel rod, bending to no one's will.
* Like a conductor wielding an iron fist, controlling every aspect of the orchestra.
Emphasizing lack of responsiveness:
* As unresponsive as a deaf ear to pleas for change.
* Like a closed book, keeping their thoughts and plans secret.
* As unyielding as a mountain, ignoring the pleas of the people.
Emphasizing harshness:
* As harsh and unforgiving as a storm.
* Like a tyrant, ruling with an iron fist.
* As cruel and merciless as a predator.
Emphasizing isolation:
* As isolated as an island, disconnected from the needs of the people.
* Like a lone king on a throne, detached from the realities of their kingdom.
* As distant and aloof as a star in the night sky.
The best simile to use will depend on the specific context and the message you want to convey.