1) Adman 2) Advertizer 3) Advocate 4) Plugger 5) Promoter 6) Sponsor 7) Touter 1) Adman 2) Advertizer 3) Publiciser 4) Publicist 5) Publicizer 
• (n.) One who, or that which, advertises.
Company or other organisation purchasing commercial airtime on television for promotional purposes.
The manufacturer, service company, retailer, or supplier who advertises their product or service.
Ad`ver·tis'er noun One who, or that which, advertises. 
[n] - someone whose business is advertising
advertizer noun someone whose business is advertising