Question: Who was also a producer, in addition to being a director, Alexander Mackendrick or Peter Chan?

Context paragraphs:
Dragon (2011 film): Dragon () is a 2011 Hong Kong-Chinese martial arts film directed by Peter Chan, and starring Donnie Yen, Takeshi Kaneshiro and Tang Wei.  Yen also served as the film's action director.  It premiered on 13 May 2011 at the 2011 Cannes Film Festival in the Midnight Screenings category.  Donnie Yen and Peter Chan presided over the lighting of a billboard for "Dragon" that broke the Guinness Book of World Records for its size, 3591 square metres, previously held by a poster for a Michael Jackson album.

The Devil's Disciple (1959 film): The Devil's Disciple is a 1959 film adaptation of the 1897 George Bernard Shaw play "The Devil's Disciple".  The Anglo-American film was directed by Guy Hamilton, who replaced Alexander Mackendrick, and starred Burt Lancaster, Kirk Douglas and Laurence Olivier.  Mary Grant designed the film's costumes.

Sweet Smell of Success: Sweet Smell of Success is a 1957 American film noir made by Hecht-Hill-Lancaster Productions and released by United Artists.  It was directed by Alexander Mackendrick and stars Burt Lancaster, Tony Curtis, Susan Harrison and Martin Milner.  The screenplay was written by Clifford Odets, Ernest Lehman and Mackendrick from the novelette by Lehman.  Mary Grant designed the film's costumes.

The Ladykillers: The Ladykillers is a 1955 British black comedy film made by Ealing Studios.  Directed by Alexander Mackendrick, it stars Alec Guinness, Cecil Parker, Herbert Lom, Peter Sellers, Danny Green, Jack Warner and Katie Johnson as the old lady.

Jon Gustafsson: Jon Gustafsson is an Iceland born film director.  The Icelandic spelling of his name is Jón Gústafsson.  Best known for directing the Canadian documentary film Wrath of Gods, starring Gerard Butler, Wendy Ord, Sarah Polley, Paul Stephens and Sturla Gunnarsson.  He grew up in Iceland where he started his career as a television performer before studying filmmaking at Manchester Polytechnic and directing for film and theatre at CalArts where he was mentored by the legendary Ealing Studios director Alexander Mackendrick.  Wrath of Gods was his second documentary for CBC Newsworld, the first one was The Importance of Being Icelandic.  He immigrated to Canada where he directed the low-budget feature film Kanadiana and the music video Brighter Hell for the Canadian rock band The Watchmen.  In 2011 Jon Gustafsson produced the award winning short film In A Heartbeat, directed by Karolina Lewicka, through his production company Artio Films.

Peter Chan: Peter Ho-sun Chan (born 28 November 1962) is a film director and producer.

The Man in the White Suit: The Man In The White Suit is a 1951 science-fiction satirical comedy film made by Ealing Studios.  It starred Alec Guinness, Joan Greenwood and Cecil Parker and was directed by Alexander Mackendrick.  The film was nominated for an Academy Award for Best Writing (Screenplay) for Roger MacDougall, John Dighton and Alexander Mackendrick (who was a cousin of Roger MacDougall).

Don't Make Waves: Don't Make Waves is a 1967 American sex farce (with elements of the beach party genre) starring Tony Curtis, Claudia Cardinale, Dave Draper and Sharon Tate.  Distributed by Metro-Goldwyn-Mayer, the film was directed by Alexander Mackendrick and is based on the 1959 novel "Muscle Beach", by Ira Wallach, who also wrote the screenplay.

Mandy (film): Mandy is a 1952 British film about a family's struggle to give their deaf daughter a better life.  It was directed by Alexander Mackendrick and is based on the novel "The Day Is Ours" by Hilda Lewis.  It stars Phyllis Calvert, Jack Hawkins and Terence Morgan, and features the first film appearance by Jane Asher.  In the US the film was released as The Story of Mandy, later also distributed as Crash of Silence.

Alexander Mackendrick: Alexander Mackendrick (September 8, 1912 – December 22, 1993) was an American born Scottish director and teacher.  He was born in Boston, Massachusetts and later moved to Scotland.  He began making television commercials before moving into post-production editing and directing films, most notably for Ealing Studios where his films include "Whisky Galore! " (1949), "The Man in the White Suit" (1951), and "The Ladykillers" (1955).

Supporting paragraphs: Alexander Mackendrick Peter Chan
Answer: Peter Ho-sun Chan