Question: Which American film director was also a choreographer, Bob Fosse or Joseph Ruben?

full_context: Document 1: Fred Astaire: Fred Astaire (born Frederick Austerlitz; May 10, 1899 – June 22, 1987) was an American dancer, singer, actor, choreographer and television presenter.
Document 2: Joseph Henabery: Joseph Henabery (January 15, 1888 – February 18, 1976) Omaha, Nebraska, was a US film actor, screenplay writer, and director.
Document 3: Joe Johnston: Joseph Eggleston "Joe" Johnston II (born May 13, 1950) is an American film director and former effects artist best known for such effects-driven movies as "Honey, I Shrunk the Kids" (1989), "Jumanji" (1995) and "Jurassic Park III" (2001). These movies include a number of period films such as "The Rocketeer" (1991), "The Wolfman" (2010), and "" (2011). In 1999 Johnston won acclaim for the biographical drama "October Sky".
Document 4: All That Jazz (film): All That Jazz is a 1979 American musical drama film directed by Bob Fosse. The screenplay by Robert Alan Aurthur and Fosse is a semi-autobiographical fantasy based on aspects of Fosse's life and career as dancer, choreographer and director. The film was inspired by Fosse's manic effort to edit his film "Lenny" while simultaneously staging the 1975 Broadway musical "Chicago". It borrows its title from the Kander and Ebb tune "All That Jazz" in that production. The film won the Palme d'Or at the 1980 Cannes Film Festival.
Document 5: Gwen Verdon: Gwyneth Evelyn “Gwen” Verdon (January 13, 1925 – October 18, 2000) was an American actress and dancer. She won four Tony awards for her musical comedy performances and served as uncredited choreographers assistant and specialty dance coach for both theater and film. With flaming red hair and a quaver in her voice, Verdon was a critically acclaimed performer on Broadway in the 1950s, 1960s, and 1970's. Having originated many roles in musicals she is also strongly identified with her second husband, director–choreographer Bob Fosse, remembered as the dancer–collaborator–muse for whom he choreographed much of his work and as the guardian of his legacy after his death.
Document 6: Busby Berkeley: Busby Berkeley (born Berkeley William Enos; November 29, 1895 – March 14, 1976) was an American movie director and musical choreographer.
Document 7: Henry Alex Rubin: Henry Alex Rubin studied film at Phillips Academy, Andover and Columbia University.
Document 8: Jerome Robbins: Jerome Robbins (October 11, 1918 – July 29, 1998) was an American choreographer, director, dancer, and theater producer who worked in classical ballet, on Broadway, and in films and television. Among his numerous stage productions he worked on were "On the Town", "Peter Pan", "High Button Shoes", "The King And I", "The Pajama Game", "Bells Are Ringing", "West Side Story", "", and "Fiddler on the Roof"; Robbins was a five time Tony Award winner and a recipient of the Kennedy Center Honors. He received two Academy Awards, including the 1961 Academy Award for Best Director with Robert Wise for "West Side Story". A documentary about his life and work, "Something to Dance About", featuring excerpts from his journals, archival performance and rehearsal footage, and interviews with Robbins and his colleagues, premiered on PBS in 2009 and won both an Emmy and a Peabody Award the same year.
Document 9: Richard P. Rubinstein: Richard P. Rubinstein (born June 15, 1947) is an American film and television producer, who has worked mainly in the science fiction and horror genres. In the 1970s and 1980s he collaborated frequently with horror director George A. Romero, including on the seminal 1978 zombie film "Dawn of the Dead" and the 1984–1988 anthology horror television series "Tales from the Darkside". In the 1980s and 1990s Rubinstein produced a substantial number of projects based on the writings of horror novelist Stephen King.
Document 10: Rob Cohen: Rob Cohen (born March 12, 1949) is an American director of film and television, producer and screenwriter.
Document 11: Ruben Fleischer: Ruben Samuel Fleischer (born October 31, 1974) is an American film director, film producer, television producer, music video director, and commercial director who lives in Los Angeles. He is best known as the director of the critically acclaimed and financially successful "Zombieland", his first feature film. He followed it by making the films "30 Minutes or Less" and "Gangster Squad", both of which opened to mixed reviews. He will next direct the 2018 film version of "Venom" which is based on the Marvel Comics character. Prior to directing feature films, Fleischer was a prolific director of television commercials and music videos, working for such brands as Cisco, Eurostar, ESPN, and Burger King, as well as such artists as M.I.A., Electric Six, DJ Format, and Gold Chains.
Document 12: Joe May: Joe May (7 November 1880, in Vienna – 29 April 1954, in Hollywood), born Joseph Otto Mandel, was a film director and film producer born in Austria and one of the pioneers of German cinema.
Document 13: Herbert Ross: Herbert David Ross (May 13, 1927 – October 9, 2001) was an American actor, choreographer, director and producer who worked predominantly in the stage and film.
Document 14: Joseph Ruben: Joseph Porter Ruben (born May 10, 1950) is an American film director, screenwriter and producer.
Document 15: Bob Fosse: Robert Louis Fosse (June 23, 1927 – September 23, 1987) was an American dancer, musical theatre choreographer, director, screenwriter, film director and actor.
ground_truth: Robert Louis Fosse