Title: Angel (1999 TV series)
Content:  Joss Whedon is credited as executive producer throughout the run of the series. Alongside Angel, he was also working on a series of other projects such as Buffy, Fray, Astonishing X-Men and Firefly, which would later also lead to the film Serenity. For the first three seasons, David Greenwalt, who co-created the series with Whedon, was also credited as executive producer; during this time, he also took on the role of show runner. He left to oversee Miracles, but continued to work on Angel as a consulting producer for the final two seasons. Tim Minear also served as an executive producer 
Title: Angel (season 1)
Content:  Series creators Joss Whedon and David Greenwalt both served as executive producers, while Greenwalt would serve as the series' showrunner as Whedon was running Buffy. Greenwalt wrote the most episodes, writing or co-writing five episodes and contributing stories for two other episodes. Tim Minear was hired from the offset and wrote or co-wrote five episodes throughout the season and served as producer and then promoted to supervising producer midseason. He was also the first original Angel writer to write an episode; the first five scripts of the series were all written by Buffy veterans; Whedon, Greenwalt, Jane Espenson, Douglas Petrie and David Fury. Buffy writer/producer Marti Noxon served as consulting producer and did several uncredited rewrites, and co-wrote one episode with Greenwalt. The rest 
Title: Angel (1999 TV series)
Content:  the second season, contributing heavily to the season's story arc. At the start of the fourth season, David Simkins was made showrunner and executive producer, but after three months, he left the show due to "creative differences" and is not credited in any episodes. Established Angel writer Jeffrey Bell took over for the balance of season 4 and became executive producer for season 5. After Buffy concluded, writer David Fury joined the staff as executive producer for the final season. Fran Rubel Kuzui and her husband, Kaz Kuzui, were also credited as executive producers throughout Angel, but were not involved in 
Title: Angel Lover
Content: Producer: Danny Dun / Pan Jie ; Director: Danny Dun ; Screenwriter: Fang Yi De / An Jin Hong ; Music: Huang Yu Ling 
Title: Angel (season 3)
Content:  Series creators Joss Whedon and David Greenwalt served as executive producers, while Greenwalt would serve as the series' showrunner as Whedon was running Buffy and developing his new series, Firefly. Whedon wrote and directed one episode during the season; "Waiting in the Wings". Greenwalt wrote four of the season's episodes and directed two, the premiere and the finale. Tim Minear was promoted to executive producer midseason and wrote and/or directed six episodes of the season including important, Connor-centric episodes such as "Lullaby", "A New World" and "Benediction". Buffy writer/producer Marti Noxon served as consulting producer for her final season on Angel, as she was also running Buffy since she was promoted to executive producer. Buffy writer David Fury wrote one freelance episode, and he officially joined the writing staff in the following 
Title: The Angel Song
Content: Producer: Ezio ; Engineering: Mark Gillespie and Steve Bottomley ; Cover illustration: Giovanna Pierce ; Sleeve design: Nick 
Title: Angel (season 2)
Content:  Series creators Joss Whedon and David Greenwalt served as executive producers, while Greenwalt would serve as the series' showrunner as Whedon was running Buffy. Whedon didn't write a script for the season, although he did write the stories to "Judgment" and "Happy Anniversary", directed the fourth episode "Untouched" and even acted in the season's penultimate episode as Lorne's dancing cousin Numfar. Buffy writer/producer Marti Noxon served as consulting producer, with other Buffy writers Jane Espenson, Douglas Petrie and David Fury were asked to write freelance scripts. Tim Minear (supervising producer, promoted to co-executive producer midseason) and Jim Kouf (consulting producer) 
Title: The Angel (2018 American film)
Content:  On May 5, 2017, it was announced that Marwan Kenzari was set to star in The Angel for director Ariel Vromen from a screenplay by David Arata, with Netflix distributing the film. The film began production in early July 2017 in London, England and also was shot in the United Kingdom, Bulgaria, and Morocco. The rest of the cast was confirmed on July 25, 2017, with the film in principal production.
Title: Angel Station
Content: Anthony Moore – producer ; Rik Walton – engineer ; Davie Phee, Edwin Cross – assistant engineers ; Martin Poole – art direction ; John Shaw – photography (front cover) ; Pat King – photography (back cover) 
Title: Angel (season 4)
Content:  Series creator Joss Whedon remained as the sole executive producer of the show after David Greenwalt left at the end of season three to produce the ABC series Miracles after his contract with 20th Century Fox was up. He stayed on as a consulting producer for the remainder of the series. At the start of the season, David Simkins was made showrunner and executive producer, but after three months, he left the show due to "creative differences" and is not credited in any episodes. Jeffrey Bell was promoted to co-executive producer and assumed the role of showrunner for the season. Tim Minear also left the series to run Whedon's new series Firefly but, like Greenwalt, stayed on as a consulting producer, and wrote and directed the season finale "Home". Whedon would write and direct only one episode of the season, 

Question: Who was the producer of Angel?
Answer: Joss Whedon.
Joseph Hill Whedon.