John Constantine (2005)

John Constantine is a cynical exorcist and hunter of demonic entities currently living in Los Angeles.

John was portrayed by Keanu Reeves in the 2005 movie " Constantine" a loose adaptation of the Hellblazer comic books, before then he made his first appearance in the video game tie-in, and subsequently the  novelization, and  comic adaptions. He is referenced briefly in Hellblazer: War Lord by the John Constantine from the Vertigo universe.