disseminator

noun

1. One who, or that which, disseminates.

   “It is these people, gentlemen, the disseminators of these rumours, who are my dangerous accusers; because those who hear them suppose that anyone who inquires into such matters must be an atheist.”

   “I think that the New Song movement may hold the key in the cultural merging of many cultures and peoples, for it expands the role of the artists into a disseminator of artistic culture, instead of the self-absorbed, individualistic style that characterizes North American songwriters.”