Howard Hesseman ( born February 27 , 1940 ) is an American actor best known for playing disc jockey Johnny Fever on `` WKRP in Cincinnati '' and schoolteacher Charlie Moore on `` Head of the Class '' .
Howard Hesseman ( born February 27 , 1940 ) is an American actor . He is best known for playing disc jockey Johnny Fever on `` WKRP in Cincinnati '' and schoolteacher Charlie Moore on `` Head of the Class '' .