Question: Who was the choreographer of Alice Cooper's Welcome to My Nightmare?

Context paragraphs:
Steven (Alice Cooper character): Steven is a fictional character invented by the rock artist Alice Cooper.  He appears on the albums "Welcome to My Nightmare" (1975), "Alice Cooper Goes to Hell" (1976) -- via "A Bedtime Story" in the liner notes, "Hey Stoopid" (1991), "The Last Temptation" (1994), "Along Came a Spider" (2008), and "Welcome 2 My Nightmare" (2011).

Pretties for You: Pretties for You is the debut album by Alice Cooper.  It was released in June 1969 by Straight Records.  At this time, the name "Alice Cooper" referred to the band, not its lead singer Vincent Furnier, although he was later also known as Alice Cooper.  The music has a psychedelic flavor to it; the group had yet to develop the more concise hard rock sound that they would become famous for.  Most of the tracks feature unusual time signatures and arrangements, jarring syncopation, expressive dynamics, sound effects, and an eclectic range of music influences.  A few songs, such as "Levity Ball," show the influence of Syd Barrett-era Pink Floyd, with whom Alice Cooper hung out during the British group's U.S. tour.  Too bizarre and avant-garde for its time, "Pretties for You" was a critical and commercial failure, only briefly denting the "Billboard" Top 200, and none of its songs have ever been played live by Cooper since the release of the band's breakthrough album "Love It to Death".

Welcome to My Nightmare (film): In 1975, Alice Cooper released his first solo album, "Welcome to My Nightmare", and a huge theatrical stage show was created and put together by Winters to 'tour the album'.  Whilst in the past the Alice Cooper stage show was semi-improvisatory, with confrontational elements of violence and satire (see "Good to See You Again, Alice Cooper"), the new production was purely horror-themed and professionally choreographed and performed to the split second (Winters had a long history of choreographing and directing big celebrity films, stage and TV shows starring in the cast of West Side Story and choreographing 4 films with Elvis Presley and 5 films with Ann-Margret).  With the edginess removed (gone were the bloody guillotine, the spit and the skewered baby dolls, although "Only Women Bleed" presented a drunken, physically abusive side to the character), the "Welcome to My Nightmare" show was part a carefully planned move toward a more mainstream-friendly 'Alice'.

Welcome to My Nightmare: Welcome to My Nightmare is the eighth studio album by Alice Cooper, released in March 1975.  This was Alice Cooper's first solo album (all previous Alice Cooper releases were band efforts), and his only album for the Atlantic Records label.  The ensuing tour was one of the most over-the-top excursions of that era.  Most of Lou Reed’s band joined Cooper for this record.

Poison (Alice Cooper song): "Poison" is a song by American rock singer-songwriter Alice Cooper.  Written by Cooper, Desmond Child, and John McCurry, the song was released worldwide as a single in late-1989 from Cooper's eighteenth album, "Trash" (1989).  The song was one of Cooper's biggest hit singles in the United States, peaking at number 7 on the "Billboard" Hot 100, while peaking at number 2 in the UK Singles Chart, only being held off the top spot by the dance record, "Swing the Mood" by Jive Bunny & the Mastermixers.  "Poison" is one of Alice Cooper's best known songs.  It is ranked by "Billboard" as the "91st top song of 1989", while Ultimate Classic Rock ranked it as the "6th best Alice Cooper song", commenting "Poison sounds like a typical ’80s pop-metal number at times, but Cooper’s intensity brings it to a whole other level."

Choreography: Choreography is the art or practice of designing sequences of movements of physical bodies (or their depictions) in which motion, form, or both are specified.  "Choreography" may also refer to the design itself.  A choreographer is one who creates choreographies by practicing the art of choreography, a process known as "choreographing".  Choreography is used in a variety of fields, including musical theater, cheerleading, cinematography, gymnastics, fashion shows, ice skating, marching band, show choir, theatre, synchronized swimming, cardistry, video game production and animated art.  In the performing arts, choreography applies to human movement and form.  In dance, choreography is also known as dance choreography or "dance composition".

Alice Cooper Goes to Hell: Alice Cooper Goes to Hell is the ninth studio album by Alice Cooper, released in 1976.  A continuation of "Welcome to My Nightmare" as it continues the story of Steven, this concept album was written almost exclusively by Cooper with guitar player Dick Wagner and producer Bob Ezrin.

Welcome 2 My Nightmare: Welcome 2 My Nightmare (also known as Welcome to My Nightmare 2) is the 26th studio album by Alice Cooper, released in September 2011.  Peaking at No. 22 in the "Billboard" 200 it is Cooper's highest-charting album in the US since 1989's "Trash".

Good to See You Again, Alice Cooper: Good to See You Again, Alice Cooper is a 1974 feature film starring Alice Cooper.  The movie primarily features live concert footage of the Alice Cooper band on their record-breaking "Billion Dollar Babies" tour, filmed in Texas (mostly at the Sam Houston Coliseum) in April 1973, with some footage from other tour stops, including the Memorial Coliseum, Portland, Oregon, intercut with 'comedy' scenes of a German film director chasing the "Cooper gang" for revenge after they abandoned his would-be masterpiece movie.

Alice Cooper: The Nightmare: Alice Cooper: The Nightmare was a conceptual television special showcasing the music of the "Welcome To My Nightmare" album by Alice Cooper.  It originally broadcast in North America on April 25, 1975 by ABC.

Supporting paragraphs: Welcome to My Nightmare (film) Choreography
Answer: Winters