Question: Ben Moore is an American composer who has collaborated with many artists, one artist in particular is someone who has won six Tony Awards, which is more than any other actor--who is this artist?

Stephen Joshua Sondheim ( ; born March 22, 1930) is an American composer and lyricist known for more than a half-century of contributions to musical theatre.  Sondheim has received an Academy Award, eight Tony Awards (more than any other composer, including a Special Tony Award for Lifetime Achievement in the Theatre), eight Grammy Awards, a Pulitzer Prize, a Laurence Olivier Award, and a 2015 Presidential Medal of Freedom.  He has been described by Frank Rich of "The New York Times" as "now the greatest and perhaps best-known artist in the American musical theater."  His best-known works as composer and lyricist include "A Funny Thing Happened on the Way to the Forum", "Company", "Follies", "A Little Night Music", "Pacific Overtures", "", "Merrily We Roll Along", "Sunday in the Park with George", "Into the Woods", "Assassins", and "Passion".  He also wrote the lyrics for "West Side Story" and "Gypsy". <SEP> Stephen Flaherty (born September 18, 1960) is an American composer of musical theatre.  He works most often in collaboration with the lyricist/bookwriter Lynn Ahrens.  They are best known for writing the Broadway musicals "Once on This Island", which was nominated for eight Tony Awards, "Seussical", which was nominated for the Grammy Award, and "Ragtime", which was nominated for twelve Tony Awards and won Best Original Score.  Flaherty was also nominated for two Academy Awards and two Golden Globe Awards with Lynn Ahrens for his songs and song score for the animated film musical "Anastasia". <SEP> Ben Moore (born January 2, 1960) is an American composer whose works include art song, musical theatre, cabaret, chamber music, choral music and opera.  His songs have been recorded by Deborah Voigt, Susan Graham Nathan Gunn and Lawrence Brownlee on the EMI, SonyBMG, Warner Classics and Opus Arte labels.  "Ben Moore – 14 songs" was published by G. Schirmer in 2006.  Other singers who have performed his music include Frederica von Stade, Jerry Hadley, Robert White, and Audra McDonald.  The Metropolitan Opera's farewell gala for Joseph Volpe, broadcast nationally on PBS in 2006, featured two of his operatic parody songs.  His song cycles include "So Free Am I" commissioned by the Marilyn Horne Foundation, "Ode to a Nightingale" and "Dear Theo".  Moore wrote the score for the opera "Enemies, a Love Story" which premiered at Palm Beach Opera in February, 2015, and for "Odyssey", commissioned by the Glimmerglass Festival. <SEP> Audra Ann McDonald (born July 3, 1970) is an American actress and singer.  She has appeared on the stage in both musicals and dramas such as "Ragtime", "A Raisin in the Sun" and "Porgy and Bess".  With her full lyric soprano voice, she maintains an active concert and recording career performing song cycles and operas as well as in concerts throughout the U.S.  She starred as Dr. Naomi Bennett on the ABC television drama "Private Practice".  She has won six Tony Awards, more performance wins than any other actor, and is the only person to win all four acting categories.