Question: Between Iain Banks and Irwin Shaw, which writer has had a more diverse career?

Context paragraphs:
Whit (novel): Whit, or, Isis amongst the unsaved is a novel by the Scottish writer Iain Banks, published in 1995.  Isis Whit, a young but important member of a small, quirky cult in Scotland, narrates.  The community suspects that Isis' cousin Morag is in danger, and sends Isis out to help.

Transition (novel): Transition is a novel by Iain Banks, first published in 2009.  The American edition was published under the name "Iain M. Banks", which is the name Banks used for his science fiction work.

Iain Banks: Iain Banks (16 February 1954 – 9 June 2013) was a Scottish author.  He wrote mainstream fiction under the name Iain Banks and science fiction as Iain M. Banks, including the initial of his adopted middle name Menzies ( ).

Walking on Glass: Walking on Glass is the second novel by Scottish writer Iain Banks, published in 1985.  Banks wrote several more novels before his death in 2013, including several acclaimed science fiction novels that formed the Culture series.

Complicity (film): Complicity (or Retribution in the US market) is a 2000 film based on the novel "Complicity" by Iain Banks.  The screenplay was written by Bryan Elsley.  It was directed by Gavin Millar.  These two had previously adapted Banks's "The Crow Road" into a TV serial.

Irwin Shaw: Irwin Shaw (February 27, 1913 – May 16, 1984) was an American playwright, screenwriter, novelist, and short-story author whose written works have sold more than 14 million copies.  He is best known for two of his novels: "The Young Lions" (1948), about the fate of three soldiers during World War II, made into a film of the same name starring Marlon Brando and Montgomery Clift, and "Rich Man, Poor Man" (1970), about the fate of three siblings after World War II, that was made into a popular miniseries starring Nick Nolte.  Though Shaw's work received widespread critical acclaim, the success of his commercial fiction ultimately diminished his literary reputation.

The Wasp Factory: The Wasp Factory is the first novel by Scottish writer Iain Banks, published in 1984.  Before the publication of "The Wasp Factory," Banks had written several science fiction novels that had not been accepted for publication.  Banks decided to try a more mainstream novel in the hopes that it would be more readily accepted, and wrote about a psychopathic teenager living on a remote Scottish island.  According to Banks, this allowed him to treat the story as something resembling science fiction – the island could be envisaged as a planet, and Frank, the protagonist, almost as an alien.  Following the publication and success of "The Wasp Factory", Banks began to write full-time and would go on to write several more novels before his death in 2013, including several acclaimed science fiction novels that formed the Culture series.

Lucy Crown: Lucy Crown is a novel by American author Irwin Shaw.  First published in 1956, it was Shaw's third novel, following The Young Lions and The Troubled Air.

The State of the Art: The State of the Art is a short story collection by Scottish writer Iain M. Banks, first published in 1991.  The collection includes some stories originally published under his other byline, Iain Banks as well as the title novella and others set in Banks' Culture fictional universe.

Rich Man, Poor Man (novel): Rich Man, Poor Man is a 1969 novel by Irwin Shaw.  It is the last of the novels of Shaw's middle period before he began to concentrate, in his last works such as "Evening In Byzantium," "Nightwork," "Bread Upon The Waters," and "Acceptable Losses," on the inevitability of impending death.  The title is taken from the nursery rhyme "Tinker, Tailor".  The novel was adapted into a 1976 miniseries.

Supporting paragraphs: Iain Banks Irwin Shaw
Answer: Irwin Shaw