Question: Did Craig Schlattman and Carl Reiner both do great work in front of the camera as well as writing and directing?

Context paragraphs:
Estelle Reiner: Estelle Reiner (June 5, 1914 – October 25, 2008), described by "The New York Times" as "matriarch of one of the leading families in American comedy", was an actress and singer.  She was the wife of Carl Reiner and the mother of Rob Reiner.

The Dick Van Dyke Show: The Dick Van Dyke Show is an American television sitcom that initially aired on CBS from October 3, 1961 to June 1, 1966, with a total of 158 half-hour episodes spanning over five seasons.  The show was created by Carl Reiner and starred Dick Van Dyke, Rose Marie, Morey Amsterdam, Larry Mathews, and Mary Tyler Moore.  It centered on the work and home life of television comedy writer Rob Petrie (Van Dyke).  The show was produced by Reiner with Bill Persky and Sam Denoff.  The music for the show's theme song was written by Earle Hagen.

Document camera: Document cameras, also known as visual presenters, visualisers (in the United Kingdom), digital overheads, or docucams, are real-time image capture devices for displaying an object to a large audience.  Like an opaque projector, a document camera is able to magnify and project the images of actual, three-dimensional objects, as well as transparencies.  They are, in essence, high resolution web cams, mounted on arms so as to facilitate their placement over a page.  This allows a teacher, lecturer or presenter to write on a sheet of paper or to display a two or three-dimensional object while the audience watches.  Theoretically, all objects can be displayed by a document camera.  Most objects are simply placed under the camera.  The camera takes the picture which in turn produces a live picture using a projector or monitor.  Different types of document camera/visualizer allow great flexibility in terms of placement of objects.  Larger objects, for example, can simply be placed in front of the camera and the camera rotated as necessary,or a ceiling mounted document camera can also be used to allow a larger working area to be used.

The Seller: The Seller is a 1997 (released in 1998) American Independent feature film written and directed by American director Craig Schlattman.  It stars Brian Brophy, Mink Stole, Arthur Roberts, and Kathy Morozova in her first film role.

At Ground Zero: At Ground Zero is a 1993 Independent feature film (released in 1994) directed and written by Craig Schlattman from an original story.  It stars Thomas Jane (credited as Tom Elliott), and his then wife, Aysha Hauer (Rutger Hauer's daughter), as a couple on the run across America to find ‘home’.  Also featured in the film are Brian Brophy as Carman, and Schlattman as Bubba.  After receiving critical praise in the European and American press, "At Ground Zero" was given no advertising and a small release by a minor distributor, Filmopolis Pictures.  It has since gone on to be an Indie favorite.

Carl Reiner: Carl Reiner (born March 20, 1922) is an American comedian, actor, director and writer whose career spans nearly seven decades.

The Comic: The Comic is a 1969 Pathécolor comedy film co-written, co-produced, and directed by Carl Reiner.  It stars Dick Van Dyke as Billy Bright (which was the original title of the film), Michele Lee as Bright's love interest, and Reiner himself and Mickey Rooney as Bright's friends and work colleagues.  Reiner wrote the screenplay with Aaron Ruben; it was inspired by the end of silent film era, and, in part, by the life of silent film superstar Buster Keaton.

Annie Reiner: Sylvia Anne "Annie" Reiner (born 1949) is an American author, playwright and poet.  She is the daughter of American producer, writer and actor Carl Reiner, and actress Estelle Reiner.  She is the sister of actor and director Rob Reiner.

Craig Schlattman: Craig Schlattman is an Award winning American director, writer, producer, and cinematographer, best known for his Independent features, "At Ground Zero" starring Thomas Jane (credited as Tom Elliott), and "The Seller" starring Brian Brophy.

Greatness: Historically, in Europe, rulers were sometimes given the attribute "the Great", as in Alexander the Great, Frederick the Great and Catherine the Great.  Starting with the Roman consul and general Pompey, the Latin equivalent "Magnus" was also used, as in Pompeius Magnus, Albertus Magnus, and Carolus Magnus.  The English language uses the Latin term "magnum opus", (literally "Great work") to describe certain works of art and literature.

Supporting paragraphs: Carl Reiner Craig Schlattman
Answer: no