Promoter
Part of speech: noun
Definition: One who promotes, particularly with respect to entertainment events or goods. The section of DNA that controls the initiation of RNA transcription as a product of a gene. An accelerator of catalysis, though itself is not a catalyst..
Example sentence: I'm a free agent. I haven't allowed any promoters to have exclusive options on my fight. I don't need a promoter.
Showman
Part of speech: noun
Definition: a person who owns or runs a fairground.a theatrical impresario or promoter, someone resembling this.