In the context of creation:
* Consumer: Someone who uses or consumes goods or services.
* Destroyer: Someone or something that destroys or breaks down.
* Parasite: An organism that benefits at the expense of another organism.
* Idle: Not producing or active.
In the context of a production company or business:
* Consumer: Someone who buys or uses products or services.
* Competitor: Another company or individual that offers similar products or services.
* Distributor: Someone who distributes products or services to consumers.
In the context of agriculture:
* Consumer: Someone who eats food.
* Harvester: Someone who gathers crops.
* Wasteful: Someone or something that uses resources inefficiently.
Ultimately, the best opposite for "producer" depends on the specific situation and what you're trying to convey.