Answer: Cicero
Explanation: Marcus Tullius Cicero was one of the greatest Roman orators and possibly the greatest. He was also a successful politician, lawyer and philosopher. It is believed that his influence on the Latin language is immeasurable, because he also contributed as a prose stylist, known for exceptional and convincing speeches. He had so much influence on the speech and the history of prose, that until the 19th century was a challenge, that almost all the prose work in that field was in fact a reaction to his own model.