Question: Which director is best known for working with film, Charles Crichton or Kinka Usher?
Context: John Michael Crichton ( ; October 23, 1942 – November 4, 2008) was an American best-selling author, screenwriter, film director and producer best known for his work in the science fiction, medical fiction and thriller genres.  His books have sold over 200 million copies worldwide, and many have been adapted into films. The Divided Heart is a black-and-white British film directed by Charles Crichton and released in 1954.  The film is a drama, based on a true story of a child, whose father was a member of Slovenian Partisans executed by Nazis and whose mother was deported to Auschwitz, while little Ivan was, like other 300 babies and young children from Slovenia, whose parents were declared Banditen by Nazis, sent to Germany in a Nazi program known as Lebensborn. Bill Blewitt was a Cornish postman 'discovered' by film-maker Harry Watt and cast in his 1936 film "The Saving of Bill Blewitt".  The documentary was about the Post Office Savings Bank and featured Blewitt and the villagers of Mousehole in Cornwall.  Assistant director Pat Jackson remembered Blewitt's "mesmeric gift of the gab, a glorious Cornish accent, twinkling blue eyes, a grin as broad as 'Popeye' and the charismatic charm of the Celt."  Charles Crichton remembered Blewitt as a natural actor and storyteller. Law and Disorder is a 1958 British comedy film directed by Charles Crichton and starring Michael Redgrave, Robert Morley, Joan Hickson, Lionel Jeffries.  It was based on the 1954 novel "Smugglers' Circuit" by Denys Roberts.  The film was started by director Henry Cornelius who died whilst making the film.  He was replaced by Charles Crichton. Myrna Fahey (March 12, 1933 – May 6, 1973) was an American actress best known for her role as Maria Crespo in "Walt Disney's Zorro" and as Madeline Usher in the film version of Edgar Allan Poe's, "The Fall of the House of Usher". Painted Boats (US titles The Girl on the Canal or The Girl of the Canal) is a black-and-white British film directed by Charles Crichton and released by Ealing Studios in 1945.  "Painted Boats", one of the lesser-known Ealing films of the period, is brief (63 minutes long), uses a little-known cast and has a slight storyline.  It is however considered significant by waterways enthusiasts as a fictionalised documentary, providing a rare extensive filmic depiction of a long-gone way of life on England's working canal system in the 1940s.  The narration was by Louis MacNeice, including some verse specially written to suit the onscreen action, most notably the sequence in which the narrow boat is being 'legged' through one of the tunnels. Simon Baker (born 30 July 1969) is an Australian actor and director.  In his television acting career, he is known for his lead roles in the CBS television series "The Mentalist" (as Patrick Jane) and "The Guardian" (as Nicholas Fallin).  In his film acting career, he is best known for his roles as Max Rourke in the remake of the Japanese horror film "The Ring Two", Riley Denbo in "Land of the Dead" and Christian Thompson in the film adaptation of "The Devil Wears Prada". Charles Ainslie Crichton (6 August 1910 – 14 September 1999) was an English film director and editor.  Born in Wallasey, Cheshire, he became best known for directing many comedies produced at Ealing Studios and had a 40-year career editing and directing many films and television programmes.  For the acclaimed comedy "A Fish Called Wanda" (1988), Crichton was nominated for both the Academy Award for Best Director and the Academy Award for Best Original Screenplay (along with the film's star John Cleese). Kinka Usher is a director of television commercials.  He also directed the 1999 feature film "Mystery Men". Michael Hertzberg is an American assistant director, writer, and film producer best known for his work with director Mel Brooks.  Hertzberg was extremely influential on Brooks, having started working for Brooks as an assistant director on Brook's first film "The Producers", and going on to produce several of Brooks' early films including box office hits, "Blazing Saddles" and "Silent Movie".  "Blazing Saddles" was awarded the #6 slot on the American Film Institute's list of Top 100 comedy films of all time.  Hertzberg started working as an assistant director in commercials, television and feature films.  He was the first assistant director to Frank Perry on the hit cult film, "The Swimmer", starring Burt Lancaster.
Answer: Charles Ainslie Crichton