They are all inventors
It would range from Zero for a Jehovah's Witnesses evangelist; to an enormously high number for a Protestant evangelist.
The noun evangelist has the regular S plural evangelists.
Henry Drummond - evangelist - was born in 1851.
Michael Reid - evangelist - was born in 1944.
Francis Murphy - evangelist - died in 1907.
David Watson - evangelist - died in 1984.
John Darby - evangelist - was born in 1800.
Henry Drummond - evangelist - died in 1897.
Johann Evangelist Holzer was born in 1709.
Johann Evangelist Holzer died in 1740.
John Evangelist Stadler was born in 1804.