Kevin Turvey was a British television comedy character, created by actor and comedian Rik Mayall, who featured in the BBC sketch show "A Kick Up the Eighties" in 1981.
Ken Cheng, is a British born Chinese (BBC) professional poker player and comedian noted for his YouTube comedy character, "Mark Liu", and reaching the final of the 2015 BBC New Comedy Awards.
Sjef van Oekel was a popular TV comedy character created by Dutch artist Wim T. Schippers and played by Dutch comedian, singer and actor Dolf Brouwers (1912–1997).
 Van Oekel started as a side character in "De Fred Hachéshow" in 1972, but became such a cult figure that he gained his own television show, "Van Oekel's Discohoek", songs and even a comic strip, all written by Schippers.
Taskmaster is a forthcoming American comedy panel game show, originally created by British comedian Alex Horne during the Edinburgh Festival Fringe in 2010, transferred to UK television on Dave in 2015, and later adapted for American television on Comedy Central in 2017.
 The American TV series stars comedian and actor Reggie Watts in the titular role of the Taskmaster, issuing simple comedic and bizarre tasks to regular contestants, with Horne acting as Watts' assistant and umpire during the challenges.
 The series will be recorded in California, and the contestants for the first series will be Lisa Lampanelli, Freddie Highmore, Ron Funches, Dillon Francis, and Kate Berlant.
Steve Delaney (born 1954) is an English comedian and character actor, best known for his comedy character Count Arthur Strong on BBC Radio 4 and then a television sitcom broadcast on BBC2 and BBC1.
Constance, Lady Crabtree is a comedy character created by the author and broadcaster Paul James in July 1978.
 Intended only as a single cabaret performance, Lady Crabtree proved to be so popular with audiences in the UK that he has now been performing her on stage, radio and television for almost forty years.
 The first radio broadcast was as a celebrity panellist on a BBC Radio 2 quiz show "Funny Peculiar" (1982) with Gyles Brandreth, Sandra Dickinson, Barry Cryer, Clement Freud, Roger Cook, Magnus Pyke and June Whitfield.
 Early television appearances included BBC 1's "Pebble Mill at One" and "Daytime Live" (1988) and ITV's "The James Whale Show" (1990); Lady Crabtree has broadcast on radio and television worldwide, most recently in February 2008 when she was one of Dame Margot Hamilton's guests on BBC Three's "Upstaged" series and in 2013 when interviewed on the "Scott Spears Now" show for American television following the birth of Prince George of Cambridge.
 2018 will mark Lady Crabtree's 40th anniversary in public life.
Isaiah Edwin Leopold (November 9, 1886 – June 19, 1966), better known as Ed Wynn, was an American actor and comedian noted for his "Perfect Fool" comedy character, his pioneering radio show of the 1930s, and his later career as a dramatic actor.
Chloe Sullivan is a fictional character in the television series "Smallville", which is based on the Superman and Superboy comics published by DC Comics.
 Portrayed by series regular Allison Mack, the character was created exclusively for "Smallville" by series developers Alfred Gough and Miles Millar.
 Other than main character Clark Kent, Chloe is the only main character to last the duration of the show, though Mack only signed on for five episodes in the tenth and final season.
 The character has also appeared in various literature based on "Smallville", an internet series, and was then later adapted back into the original Superman comics which inspired "Smallville".
"Ninety Years Without Slumbering" is episode 132 of the American television anthology series "The Twilight Zone".
 The title comes from the lyrics of the song "My Grandfather's Clock", which is sung or played throughout the episode as a recurring motif.
 As in the song, main character Sam Forstmann (played by Ed Wynn) believes his life is tied to his clock's ticking.
Dr. Jack Shephard is a fictional character and the main protagonist of the ABC television series "Lost", played by Matthew Fox.
 "Lost" follows the journey of the survivors of Oceanic Airlines flight 815 on a mysterious island and their attempts to survive and escape, slowly uncovering more of the much broader island history they are a part of.
 The character was originally conceived by creator J. J. Abrams, though the direction of storylines owes more to co-creator Damon Lindelof and fellow showrunner Carlton Cuse.
 J.J. Abrams, the creator of "Lost", once told "Entertainment Weekly", "Jack Shephard may be the greatest leader in any television series."
 Actor Matthew Fox would have some influence on the character during the course of the series' production.
 For example, Fox's own tattoos were incorporated into the character's backstory.
 Although at an early stage in the show's development, the character was originally intended to die in the pilot, the writers soon changed this plan, and Jack became the show's main character from its pilot episode onwards.

Question: Which American television series stars, as its main character, the American Actor and Comedian noted for his "Perfect Fool" comedy character?
Answer: The Twilight Zone