The Brain Leeches is a 1978 sci-fi film directed by Fred Olen Ray and starring Paul Jones, Marcia Scott & Ray Starr.
Biohazard is a 1985 science-fiction horror film directed by Fred Olen Ray and starring Aldo Ray and Angelique Pettyjohn.
Bikini Cavegirl (also known as Teenage Cavegirl) is a softcore pornographic film made by Fred Olen Ray under the pseudonyms "Nicholas Medina" and "Sherman Scott".
 It has been described as "a sexy makeover", but not a remake, of Ray's earlier film, "Dinosaur Island".
 It was released directly to video in 2004 under the title "Teenage Cavegirl", and is shown on cable as "Bikini Cavegirl".
Billy Frankenstein is a 1998 horror-comedy movie directed by Fred Olen Ray and written by his wife Kim Ray.
Guy Ritchie (born 10 September 1968) is an English filmmaker known for his crime films.
 He left secondary school and got entry-level jobs in the film industry in the mid-1990s.
 Ritchie eventually went on to direct commercials.
 He directed his first film in 1995, a 20-minute short that impressed investors who backed his first feature film, the crime comedy "Lock, Stock and Two Smoking Barrels" (1998).
 He then directed another crime comedy, "Snatch" (2000).
 Ritchie's other films include "Revolver" (2005), "RocknRolla" (2008), "Sherlock Holmes" (2009), and its sequel "" (2011).
Mom's Outta Sight is a 1998 American film, starring Hannes Jaenicke, Mary Elizabeth McGlynn and Harrison Myers.
 It was directed by Fred Olen Ray and written by Sean O'Bannon.
The Alien Dead is a 1980 American horror film directed by Fred Olen Ray.
 Ray co-wrote the script with Martin Nicholas.
Fred Olen Ray (born September 10, 1954) is an American film director, producer, screenwriter, actor, and cinematographer.
Mark Thomas McGee (born 1947) is an American actor, writer and director.
 He has written a number of screenplays, most notably for Fred Olen Ray.
 He also wrote the cult classic "Equinox" (1970) when only a teenager.
Steve Latshaw (b 1959) is an American screenwriter, producer and director.
 He has written a number of films for Jim Wynorski and Fred Olen Ray.

Question: Who is an American film director, Guy Ritchie or Fred Olen Ray?
Answer: Fred Olen Ray