Question: Were both S. Sylvan Simon and Jörg Buttgereit directors?

Context articles: Nekromantik 2
Nekronology
S. Sylvan Simon
Jörg Buttgereit
I Love Trouble (1948 film)
Nekromantik
Der Todesking
The Bugle Sounds
Salute to the Marines
Schramm (film)

Nekromantik 2: Die Rückkehr der Liebenden Toten (The Return of the Loving Dead) (stylized as "NEKRomantik 2") is a 1991 German horror film directed by Jörg Buttgereit and a sequel to his 1987 film "Nekromantik".
 The film is about necrophilia, and was quite controversial and was seized by authorities in Munich 12 days after its release, an action that had no precedent in Germany since the Nazi era.
Nekronology is an album by the German avant-garde/experimental musician Hermann Kopp.
 It was released in October 2004 as a CD and in July 2009 as a vinyl LP, with a different artwork.
 The album is a compilation of Kopp’s soundtracks to the German films Nekromantik, Der Todesking and Nekromantik 2 by the film director Jörg Buttgereit, completed by two bonus tracks.
S. Sylvan Simon (March 9, 1910 – May 17, 1951) was an American stage/film director and producer.
Jörg Buttgereit (born 20 December 1963) is a German writer/director known for his controversial films.
 He was born in Berlin, Germany and has lived there his entire life.
I Love Trouble is a 1948 American film noir mystery film written by Roy Huggins from his first novel "The Double Take", directed by S. Sylvan Simon, and starring Franchot Tone as Stuart Bailey.
 The character of Stuart Bailey was later portrayed by Efrem Zimbalist, Jr. in the television series "77 Sunset Strip".
Nekromantik (stylized as NEKRomantik) is a 1987 West German horror exploitation film co-written and directed by Jörg Buttgereit.
 It is known to be frequently controversial, banned in a number of countries, and has become a cult film over the years due to its transgressive subject matter (including necrophilia) and audacious imagery.
Der Todesking (aka "The Death King") is a 1989 German horror film directed by Jörg Buttgereit.
 This experimental style movie, which does not use central characters, explores the topic of suicide and violent death in the form of seven episodes, each one attributed to one day of the week.
 These episodes are enframed by the vision of a human body, slowly rotting during the course of the movie.
The Bugle Sounds is a 1942 World War II movie starring Wallace Beery as a cavalry sergeant resistant to replacing horses with tanks.
 The supporting cast includes Marjorie Main, Lewis Stone, George Bancroft, Donna Reed, and Chill Wills, and the film was directed by S. Sylvan Simon.
Salute to the Marines is a 1943 World War II propaganda war film drama in Technicolor from MGM, produced by John W. Considine, Jr., directed by S. Sylvan Simon, that stars Wallace Beery.
 The film co-stars Fay Bainter, Reginald Owen, Ray Collins, Keye Luke, and Marilyn Maxwell.
 Beery's older brother Noah Beery, Sr. also appears in the film, which is set in the Philippines just prior to the beginning of the Pacific War.
Schramm is a 1993 German horror film directed by controversial taboo-breaking auteur Jörg Buttgereit.
 It is stylised and artfully shot on 16mm film.
 It tells the story of a man who has been known in the media as the 'Lipstick Killer'.
 Loosely based on true crime criminology profiles of Carl Panzram and similar serial killers.