Question: Who, Richard Benjamin or Sergio Leone, is an American actor and film director?

Context paragraphs:
The Good, the Bad and the Ugly: The Good, the Bad and the Ugly (Italian: "Il buono, il brutto, il cattivo" ,  "The good, the ugly, the bad" ) is a 1966 epic Spaghetti Western film directed by Sergio Leone and starring Clint Eastwood, Lee Van Cleef, and Eli Wallach in their respective title roles.  Its screenplay was written by Age & Scarpelli, Luciano Vincenzoni and Leone (with additional screenplay material and dialogue provided by an uncredited Sergio Donati), based on a story by Vincenzoni and Leone.  Director of photography Tonino Delli Colli was responsible for the film's sweeping widescreen cinematography, and Ennio Morricone composed the film's score including its main theme.  It was an international co-production between Italy, Spain, West Germany and the United States.

The Last Days of Pompeii (1959 film): The Last Days of Pompeii (Italian: "Gli ultimi giorni di Pompei" ) is a 1959 Italian sword and sandal action film starring Steve Reeves, Christine Kaufmann, and Fernando Rey and directed by Sergio Leone.  Mario Bonnard, the original director, fell ill on the first day of shooting, so Leone and the scriptwriters finished the film.

Gonzalo Gavira: Gonzalo Gavira (October 30, 1925 – January 9, 2005) was a Mexican movie sound technician.  He formed part of the team that won an Oscar for the movie "The Exorcist" in 1973.  Outside of Mexico he worked on more than 60 other films, including the disaster movie "The Towering Inferno" and western "El Topo", as well as Sergio Leone's "The Good, The Bad, And The Ugly".  While working in the United States he always worked with an assistant named Ruben C. Bustamante, Mr. Gavira referred to him as invaluable.  In 1975 he was awarded the Silver Ariel, which is the highest award that can be received from Mexican theatre.  He died in 2005, reportedly from circulation problems.  Along with working together with director Sergio Leone, Gonzalo Gavira worked with William Friedkin, Alejandro Jodorosky (The Holy Mountain) and the great Cantinflas, who on many occasions classified Mr. Gavira as a genius.  Once upon meeting Lee Marvin, Gonzalo Gavira asked Mr. Marvin to autograph a twenty dollar bill.  Lee Marvin refused, stating he would rather use that twenty to buy some drinks later, they became fast friends.  Mr. Gonzalo Gavira worked on approximately 80% of all movie features made in Mexico.  "Letters from Marusia" was nominated for Best Foreign Film at the 1976 Oscars and "Canoa" won Picture of the Year 1976 in Mexico City.

Sergio Donati: Sergio Donati (born 13 April 1933) is an Italian screenwriter.  He has written for more than 70 films since 1952.  He was born in Rome, Italy.  He started as a writer and had some of his books optioned for film.  He is well known for his collaboration with Italian director Sergio Leone, who encouraged him to take up screenwriting as a full-time career, and with Italian producer Dino de Laurentis.

Mickey Knox: Abraham "Mickey" Knox (December 24, 1921 − November 15, 2013) was an American actor with nearly 80 films to his credit.  He was also a screenwriter, film producer and novelist.  Blacklisted during the McCarthy era, he moved to Paris and Rome to work.  His screenwriter credits where he adapted approximately 150 Italian and French into English translations include the English adaptation of Sergio Leone's "The Good, the Bad and the Ugly".  As a dialogue director he coached many non-English speaking actors in performing convincingly in the English language.

Enrico Maria Salerno: Enrico Maria Salerno (18 September 1926 – 28 February 1994) was an Italian theatre and film actor, also a film director and dubber.  He was also the voice of Clint Eastwood in the Italian version of Sergio Leone's Dollars Trilogy films, and the voice of Christ in "The Gospel According to St. Matthew" directed by Pier Paolo Pasolini.

Tonino Valerii: Tonino Valerii (20 May 1934 – 13 October 2016) was an Italian film director, most known for his Spaghetti Westerns. Tonino (Antonio) Valerii started his film career as an assistant director on Sergio Leone's "A Fistful of Dollars", before moving on to direct by himself.  Among his best-known films are "Day of Anger" (1968) "The Price of Power" (1969), "A Reason to Live, a Reason to Die" (1972) and "My Name Is Nobody" (1973), starring Henry Fonda.

Sergio Leone: Sergio Leone (] ; 3 January 1929 – 30 April 1989) was an Italian film director, producer and screenwriter, credited as the inventor of the "Spaghetti Western" genre.

Roberto Roberti: Roberto Roberti (1879–1959) was an Italian actor, screenwriter and film director.  He made over sixty films, mostly during the silent era.  He was born Vincenzo Leone, but adopted Roberti as his screen name.  He was married to the actress Bice Valerian.  Their son Sergio Leone became a celebrated director.

Richard Benjamin: Richard Samuel Benjamin (born May 22, 1938) is an American actor and film director.

Supporting paragraphs: Richard Benjamin Sergio Leone
Answer: Richard Samuel Benjamin