John Stephenson

John Winfield Stephenson was an American voice actor. He provided many voices for the Hanna-Barbera company, most notably as Fred Flintstone's boss, Mr. Slate.

Stephenson died of Alzheimer's disease on May 15, 2015, at the age of 91.

20th century

 * The Flintstones (1960-1966)
 * Mr. Slate
 * Top Cat (1961-1962)
 * Fancy Fancy
 * The Peter Potamus Show (1964-1966)
 * Colonel Fuzzby
 * Jonny Quest (1964–1965)
 * Benton Quest
 * The Secret Squirrel Show (1965)
 * Chief Winchley
 * Space Ghost & Dino Boy
 * The Man Called Flintstone (1966)
 * Frankenstein Jr. and the Impossibles (1966-1968)
 * Professor Conroy
 * Moby Dick and Mighty Mightor (1967-1969)
 * Pondo
 * Tog
 * Ork
 * Bello
 * Birdman and the Galaxy Trio (1967-1969)
 * X the Eliminator
 * Cumulus
 * Reducto
 * The Banana Splits Adventure Hour (1968-1970)
 * Fariek
 * Bakaar
 * The Adventures of Gulliver (1968-1969)
 * Captain Leech
 * King Pomp
 * Wacky Races (1968-1969)
 * Lucky Luke
 * Blubber Bear
 * Scooby-Doo, Where Are You! (1969-1970)
 * Where's Huddles? (1970)
 * Mr. Cool ("The Old Swimming Hole", 1970)
 * The Pebbles and Bamm-Bamm Show (1971-1972)
 * Mr. Slate
 * Help!... It's the Hair Bear Bunch! (1971-1972)
 * Mr. Peevly
 * Slicks
 * Zeed
 * The Funky Phantom (1971-1972)
 * Sealab 2020 (1972)
 * Doctor Michael Murphy
 * The New Scooby-Doo Movies (1972-1973)
 * Yogi's Ark Lark (1972)
 * Doggie Daddy
 * Benny the Ball
 * Hardy Har Har
 * Charlotte's Web (1973)
 * John Arable
 * Yogi's Gang (1973)
 * Doggie Daddy
 * Super Friends (1973-1974)
 * Colonel Wilcox
 * Inch High, Private Eye (1973)
 * Mr. Finkerton
 * Spumoni the Great
 * Jeannie (1973)
 * The Tom & Jerry Show (1975)
 * Tom Cat
 * Jerry Mouse
 * Spike
 * The Mumbly Cartoon Show (1976)
 * Chief Shnooker
 * The Scooby-Doo Show (1976-1978)
 * Clue Club (1976)
 * Sheriff Bagley
 * The Skatebirds (1977-1978)
 * Laff-A-Lympics (1977-1978)
 * Doggie Daddy
 * Mildew Wolf
 * Dread Baron
 * Great Fondoo
 * CB Bears (1977)
 * Hunter Hunter ("The Blue Kangaroo")
 * Abernathy ("The Fright Farm")
 * Bart Karney ("Bad Medicine")
 * A Flintstone Family Christmas (1977)
 * Mr. Slate
 * The Flintstones: Little Big League (1978)
 * Mr. Slate
 * Galaxy Goof-Ups (1978)
 * Captain Snerdley
 * General Blowhard
 * Casper and the Angels (1979)
 * Harry Scary
 * The Flintstones Meet Rockula and Frankenstone (1979)
 * Count Rockula
 * Police Chief
 * Casper's First Christmas (1979)
 * Doggie Daddy
 * Harry Scary
 * The Flintstone Comedy Show (1980-1982)
 * Mr. Slate
 * Yogi's First Christmas (1980)
 * Doggie Daddy
 * Mr. Dingwell
 * The Kwicky Koala Show (1981)
 * Wilford Wolf
 * Laverne & Shirley (1981-1982)
 * Additional voices
 * Yogi Bear's All-Star Comedy Christmas Caper (1982)
 * Doggie Daddy
 * Butler
 * Announcer
 * The New Scooby and Scrappy-Doo Show (1983)
 * The New Scooby-Doo Mysteries (1984)
 * The Jetsons
 * Jeffrey ("Elroy Meets Orbitty", 1985)
 * Inspector ("Wedding Bells for Rosey", 1987)
 * Robot gang leader ("Wedding Bells for Rosey", 1987)
 * Commissioner ("Wedding Bells for Rosey", 1987)
 * Yogi's Treasure Hunt (1985-1988)
 * Doggie Daddy
 * The 13 Ghosts of Scooby-Doo
 * Boris Kreepoff ("Horror-Scope Scoob", 1985)
 * Freddie Cadaver ("Horror-Scope Scoob", 1985)
 * Yogi Bear and the Magical Flight of the Spruce Goose (1987)
 * Doggie Daddy
 * Pelican
 * Top Cat and the Beverly Hills Cats (1988)
 * Fancy Fancy
 * Officer Dibble
 * Butler
 * Hanna-Barbera's 50th: A Yabba Dabba Doo Celebration (1989)
 * Doggie Daddy
 * Super Snooper
 * Fender Bender 500 (1990-1991)
 * Doggie Daddy
 * Yo, Yogi! (1991)
 * Doggie Daddy
 * Mr. Myopic ("To Tell the Truth, Forsooth," 1991)
 * I Yabba-Dabba Doo! (1993)
 * Mr. Slate
 * Hollyrock-a-Bye Baby (1993)
 * Mr. Slate
 * A Flintstone Family Christmas (1993)
 * Mr. Slate
 * A Flintstone Christmas Carol (1994)
 * Mr. Slate

21st century

 * The Flintstones: On the Rocks (2001)
 * Mr. Slate
 * What's New, Scooby-Doo?
 * Bob Taylor ("The Unnatural," 2003)
 * Zelig ("Uncle Scooby and Antarctica," 2004)
 * Johnny Bravo
 * Mr. Slate ("A Page Right Out of History," 2004)
 * Scooby-Doo! Abracadabra-Doo (2010)
 * Sheriff