Question: Are Aaron Kozak and Kingsley Ogoro both American playwrights?

Context articles: The Kilroys' List
The Ethiopian Art Theatre/Players
Playwrights Horizons
Kingsley Ogoro
J. B. Edwards
Hecate (musician)
George Cram Cook
Osuofia in London
Aaron Kozak
Sheldon Warren Cheney

The Kilroys' List is a "gender parity" initiative to end the "systematic underrepresentation of female and trans* playwrights" in the American theater industry.
 "Gender disparity" is defined as the gap of unproduced playwrights' whose plays are being discriminated against based on the writer's gender identification and intersectional identities of race, sexual orientation, ethnicity, socioeconomic class, age, and ability.
 Recent statistical research released in November 2015, entitled "The Count", gathered that 22% of total surveyed professional productions from 2011-2013 annual seasons were written by women playwrights, 3.8% of the total were written by women playwrights of color, and 0.4% of the total were written by foreign women playwrights of color.
 78% of total surveyed professional productions were written by men playwrights.
The Ethiopian Art Theatre — originally called the Chicago Folk Theatre, later the Colored Folk Theatre, also referred to as The Ethiopian Art Players — was an African American theatre company based out of Chicago, Illinois.
 The company was an influential albeit short-lived (1922/1923–1925) group founded during the Harlem Renaissance.
 There are differing views over the precise year that the company was founded, 1922 or 1923.
 The founder was Raymond O'Neil, a white theatre director, and its principal sponsor was Mrs. Sherwood Anderson, also white; though all its performers were African American.
 The organization was unique and controversial during its era, primarily for being one of the few African American Theatre Companies to perform European theatrical works, but also, among other things, for producing theatrical works of African American playwrights for both African American and Non-African American audiences.
Playwrights Horizons is a not-for-profit Off-Broadway theater located in New York City dedicated to the support and development of contemporary American playwrights, composers, and lyricists, and to the production of their new work.
Kingsley Ogoro is a noted Nigerian film director, screenwriter and film producer best known for the acclaimed film "Osuofia in London" of 2003 in which he worked with Nkem Owoh.
J.B. Edwards (born October 3, 1951) is an American playwright known for works including: “William’s Last Chance” (2001), “A Family Reunion” (2002), “Una Reunion Familiar” (2003), “The Sanctuary” (2003), “Three Women Dating Henry” (2004), “The Day Einstein Died” (2005), “Einstein’s Secret Letters” (2005), “The Best of Everything” (2006), “A Delicate Matter” (2007), “Requeim for a Marriage” (2008) and “Sister Stories” (2009).
 His works are a study of typical American lives in the late twentieth century, and were influenced by the great American playwrights Arthur Miller and Edward Albee.
 Edwards' non-fiction books include: "The Coming Cancer Breakthroughs" (2001), "Men Head East, Woman Turn Right" (2006) and "Plays by J.B. Edwards" (2012).
 His fiction books include: "Faagraph of an Ordinary Man" and "China Dreams".
Rachael Kozak (born May 26, 1976), better known by her stage name Hecate, is an American-Austrian experimental industrial and breakcore musician based in Berlin, Germany.
 Her stage name originates from Hecate, the Greek goddess of sorcery.
 Kozak uses sexuality as a major topic in her music (such as in the tracks "Hecate Jacks Off The Jackal" and "The Magick Of Female Ejaculation"), and has a heavy focus on death and the occult.
 With over thirty releases, she has become a notable producer in the harsher genres of electronic music.
 Kozak is also known for her collaborations with prolific electronic artist Venetian Snares (Aaron Funk), creating the album "Nymphomatriarch" entirely from recordings of she and Funk having sex, during a two-week tour in 2003.
 She is also involved with video production, graphic arts and writing.
 Since 1996, Kozak has managed her own record label Zhark International, has traveled the world extensively to perform, and became involved in the extreme metal scene, particularly industrial black metal.
 She eventually formed Treachery, a black metal group.
George Cram Cook or Jig Cook (October 7, 1873 – January 14, 1924) was an American theatre producer, director, playwright, novelist, poet, and university professor.
 Believing it was his personal mission to inspire others, Cook led the founding of the Provincetown Players, the first modern American theatre company.
 During his seven-year tenure with the group Cook oversaw the production of nearly one-hundred new plays by fifty American playwrights.
 He is particularly remembered for producing the first plays of Eugene O'Neill, along with those of Cook's wife Susan Glaspell, and several other noted writers.
 As a professor at the University of Iowa from 1896 to 1899, Cook taught what is considered to be the first ever creative writing course.
 Titled "Verse-Making," the course was continued by Cook's colleagues at the university after his departure where it gradually evolved into the world's first and most renowned creative writing program, the famed Iowa Writer's Workshop.
Osuofia in London is a 2003 Nigerian comedy film written and directed by Kingsley Ogoro and starring Nkem Owoh.
 The film is among the highest selling Nollywood films.
 It was followed by a 2004 sequel titled "Osuofia in London 2".
Aaron Kozak (born August 23, 1983) is an American playwright and filmmaker.
Sheldon Warren Cheney (June 29, 1886 – October 10, 1980) was an American author and art critic, born at Berkeley, California, the son of Lemuel Warren Cheney (1858–1921), California lawyer and writer, and May L. Cheney (1862–1942), Appointment Secretary at University of California, Berkeley for over forty years.
 At first he worked in his father's real estate business, later moving to Detroit where he founded the "Theatre Arts Magazine" in 1916 and edited it until 1921.
 Cheney was one of the most significant pro-modernist theatre and art critics of the early twentieth century.
 He helped introduce European modernist practices in theatre to the United States.
 His "Theatre Arts Magazine" promoted American little theatre activity, advocated for New Stagecraft design, and nurtured new American playwrights.