Gary Sherman (born 1945), is an American film director, screenwriter, and producer from Chicago, Illinois.
 He is best known for his prolific work in the horror film genre, directing films such as "Death Line, Dead & Buried", and "Poltergeist III".
Lisa is a 1990 American thriller/drama film about a teenage girl's infatuation with a stranger that, unbeknownst to her, is a serial killer-stalker.
 The film was directed and co-written by Gary Sherman.
Poltergeist III is a 1988 American supernatural horror film and is the third and final entry in the original "Poltergeist" film series.
 Writers Michael Grais and Mark Victor, who wrote the screenplays for the first two films, did not return for this second sequel; it was co-written, executive produced, and directed by Gary Sherman, and was released on June 10, 1988 by Metro-Goldwyn-Mayer Pictures.
 The film was panned by critics, and was a box office disappointment.
Hotline is a 2014 documentary feature film written and directed by Tony Shaff.
 The film explores the intense connections that are made between strangers over the telephone, and explores these anonymous conversations people are often too hesitant to have with the people closest to them.
 The film stars Miss Cleo, Jeff Ragsdale, Jamie Blaine, and Tonya Jone Miller.
Dead & Buried is a 1981 science fiction horror film directed by Gary Sherman, starring Melody Anderson, Jack Albertson, and James Farentino.
 The film focuses on a small town wherein a few tourists are murdered, but their corpses begin to reanimate.
 With a screenplay written by Dan O'Bannon and Ronald Shusett, the movie was initially banned as a "video nasty" in the UK in the early 1980s, but was later acquitted of obscenity charges and removed from the Director of Public Prosecutions' list.
Jeff, One Lonely Guy is a 2012 nonfiction book by Jeff Ragsdale.
 It was published on March 20, 2012 by New Harvest.
 Dave Eggers selected the book for inclusion in The Best American Nonrequired Reading 2012, and it was a GQ 2012 "Book of the Year".
 In 2014 Amitava Kumar included portions of "Jeff, One Lonely Guy" in his newly released book, "A Matter of Rats: A Short Biography of Patna".
 Kumar previously interviewed Ragsdale and wrote about him in "The New York Times".
Death Line is a 1972 British horror film, distributed as Raw Meat in the United States.
 The film stars Donald Pleasence as Inspector Calhoun, and was written and directed by the American filmmaker Gary Sherman.
Jeffrey Charles "Jeff" Ragsdale ( ) is an American author, documentary filmmaker, actor and stand-up comedian.
 In 2011 he posted a flyer in New York City as a "social experiment", stating his phone number and asking people to call him, describing himself as "Jeff, one lonely guy".
 He was overwhelmed with thousands of calls after photos of the flyer were posted on the internet.
 The experience led to his 2012 book "Jeff, One Lonely Guy", and indirectly to a 2013 pilot episode for a reality television show, "Being Noticed", and a starring role in the 2014 documentary "Hotline".
Wanted: Dead or Alive is a 1987 action film directed by Gary Sherman and starring Rutger Hauer as Nick Randall, the descendant of the character Josh Randall, played by Steve McQueen in the 1958 .
Vice Squad is a 1982 action/crime drama film, starring Wings Hauser, Season Hubley, and Gary Swanson, directed by Gary Sherman.
 The original music score was composed by Joe Renzetti and Keith Rubinstein.
 Wings Hauser sang the vocal track on the film's opening and closing theme song "Neon Slime".

Question: Are Jeff Ragsdale and Gary Sherman both known for comedy?
Answer: no