rhetorician
From Longman Dictionary of Contemporary Englishrhetoricianrhet‧o‧ri‧cian /ˌretəˈrɪʃən/ noun [countable] formalPERSUADE someone who is trained or skilful in the art of persuading or influencing people through speech or writing → oratorExamples from the Corpusrhetorician• As a result he was sent to Arles, where he came into contact with the rhetorician Julianus Pomerius.