A person marked by extreme enthusiasm for or support of any cause, particularly with regard to religion.
A patriarch.
A person hired to promote a particular technology.
A person who first brought the gospel to a city or region.
An itinerant or special preacher, especially a revivalist, who conducts services in different cities or locations, now often televised.
A writer of a gospel, especially the four New Testament Gospels (Matthew, Mark, Luke, and John), usually capitalized (Evangelist).
A male fan who is obsessive about a particular subject (especially, something or someone in popular entertainment media).
To worship, support, drool over the object of affection; to be a fanboy.