Question: Which actor has starred in Hardcore as well as directed and acted in over 1,800 pornographic films?

Context paragraphs:
Pornographic film: Pornographic films, or sex films, are films that present sexually subject matter for the purpose of sexual arousal and erotic satisfaction of the viewer.  Pornographic films present sexual fantasies and usually include erotically stimulating material such as nudity and depictions of sexual intercourse.  A distinction is sometimes made between "erotic" films and "pornographic" films on the basis that the latter contain more explicit sexuality, and focus more on arousal than storytelling, but the distinction is highly subjective.

Hardcore (2001 film): Hardcore is a 2001 british documentary film directed by Stephen Walker. This film has bean music composed by Richard Attree. The film starring Robert Black, David Christopher, Mark Handel, Max Hardcore, Brandon Iron and Mr. Marcus in the lead roles.

People v. Freeman: People v. Freeman was a criminal prosecution of Harold Freeman, a producer and director of pornographic films, by the U.S. State of California.  Freeman was charged in 1987 with pandering - procurement of persons "for the purpose of prostitution" - under section 266i of the Cal.  Penal Code for hiring adult actors, which the prosecution characterized as pimping.  The prosecution was part of an attempt by California to shut down the pornographic film industry.  The prosecution's characterization was ultimately rejected on appeal by the California Supreme Court.  Prior to this decision, pornographic films had often been shot in secret locations.

William Arnold Newton: William Arnold Newton (July 26, 1965 – October 29, 1990) acted in gay pornographic films under the name Billy London and Billy Porter and produced gay pornographic films under the name Bill E. London.

Randy White (actor): Randy White is a gay pornographic films actor who has appeared in more than one hundred pornographic films; he has directed gay porn films including "4 Alarm Stud".

Pornographic film actor: A pornographic actor (or actress for female), or porn star, is a person who performs sex acts in film that is usually characterized as a pornographic film.  Pornographic films tend to be made in a number of distinct pornographic subgenres and attempt to present a sexual fantasy and the actors selected for a particular role are primarily selected on their ability to create or fit that fantasy.  Pornographic films are characterized as either "softcore", which does not contain depictions of sexual penetration or "extreme fetishism", and "hardcore", which can contain depictions of penetration or extreme fetishism, or both.  The genres and sexual intensity of films is mainly determined by demand.  Depending on the genre of the film, the on-screen appearance, age, and physical features of the main actors and their ability to create the sexual mood of the film is of critical importance.  Most actors specialize in certain genres, such as lesbian sex, bondage, strap-on sex, anal sex, double penetration, semen swallowing, teenage women, interracial or MILFs.  Irrespective of the genre, most actors are required to appear nude in pornographic films.

The Good Old Naughty Days: The Good Old Naughty Days (French title: "Polissons et galipettes" – "Rascals and somersaults"), released in 2002, is a compilation from over 300 recently discovered film clips from silent hardcore pornographic films made between 1905 and 1930, re-edited by director Michel Reilhac, with a new soundtrack by Eric Le Guen.  Most of the films were made in France and were intended to be shown in brothels.  The collection also includes a pornographic animation from the United States, "Eveready Harton in Buried Treasure", made by unknown artists in or around 1928 and never theatrically released before.

Mr. Marcus: Mr. Marcus (born September 4, 1970) is the stage name of Jesse Spencer, an American actor and director known for acting in or directing over 1,800 pornographic films.

Doug Jeffries: Doug Jeffries (born 1966) is an award-winning director, writer and pornographic actor from the United States who has appeared in pornographic films since 1993.  While most of his films have been gay pornographic films, he has also made bisexual videos.  Although he has directed for other studios, he primarily directs for Channel 1 Releasing, which includes his own line Electro Video.  He was a two-time GAYVN Awards nominee for 2007.

Puzzy Power: Puzzy Power (aka HotMale) is a Danish film company started in 1997 as a subsidiary to Lars von Trier's company Zentropa, with the goal of producing hardcore pornographic films for women.  It is the only time ever a mainstream film company has openly produced hardcore pornographic films.

Supporting paragraphs: Hardcore (2001 film) Mr. Marcus
Answer: Mr. Marcus