All 3 Uses

evangelist
in
One Writer's Beginnings
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EVANGELISTS visited Jackson then; along with the Red-path Chautauqua and political speakings, they seemed to be part of August.†
Chpt 1 *
He was an evangelist, but the term meant nothing like what it stands for today.†
Chpt 1
My real characters were Lorenzo Dow the New England evangelist, Murrell the outlaw bandit and murderer on the Natchez Trace, and Audubon the painter; and the exterior object on which they all at the same moment set their eyes is a small heron, feeding.†
Chpt 3

Definitions:

(1) (evangelist)
someone who actively tries to persuade others to accept a belief or cause, especially a Christian preacher who urges people to become Christians

Most often, evangelist refers to a Christian who preaches and tries to win converts, sometimes on television, radio, or at large revival meetings. More broadly, the word can be used for anyone who strongly promotes an idea, product, or cause—such as a “climate evangelist” or a “tech evangelist.” When capitalized as Evangelist in Christian writing, it can also refer to one of the traditional authors of the four Gospels in the New Testament: Matthew, Mark, Luke, and John.
(2) (meaning too rare to warrant focus)