outspeaker

plural outspeakers

1. One who speaks out.

   […] to lower our standard of critical judgment, and finally, to make us suspicious of our genuine men, our real workers, our truthful outspeakers, our artistic models.

   1868, The Northern Monthly Magazine, volume 2, page 273

   1 more example

   The peculiar division of labor among ages and social status in this movement created a double leadership: wile ^([sic]) university leaders acted as outspeakers for the mass media, everyday organizing was done by high school leaders.

   1994, Revue Tocqueville, volumes 15-16, page 133