Peter Appleyard, {'1': ", '2': ", '3': ", '4': "} (26 August 1928 – 17 July 2013) was a British–Canadian jazz vibraphonist, percussionist, and composer.
 He spent most of his life living and performing in the city of Toronto where for many years he was a popular performer in the city's nightclubs and hotels.
 He also played and recorded with many of the city's orchestras and been featured on Canadian television and radio programs.
 In the early 1970s he drew wide acclaim for his performances with Benny Goodman's jazz sextet with which he toured internationally.
 In 1992, he was made an Officer of the Order of Canada in recognition of his being an "internationally renowned vibraphonist [who] has represented the Canadian jazz community across North America, Europe, the Middle East and Australia".
Mark Sherman (born April 17, 1957 in Manhattan) is a jazz vibraphonist, pianist, drummer, producer, arranger, author and classical percussionist.
 He has performed for some of the world's top orchestral conductors including Leonard Bernstein, Sir Georg Solti, Zubin Mehta and Herbert Von Karajan, in Jazz as a leader and sideman with Kenny Barron, Peggy Lee, Wynton Marsalis, Joe Lovano, Michael Brecker, Larry Coryell and many more.
 He worked in Broadway musicals, and has been one of the most in-demand studio musicians, appearing on more than two dozen film and Broadway soundtracks including "The Lion King."
 He has worked as a sideman for pop artists Michael Bolton, Natalie Cole, and Michael McDonald.
Lionel Leo Hampton (April 20, 1908 – August 31, 2002) was an American jazz vibraphonist, pianist, percussionist, bandleader and actor.
 Hampton worked with jazz musicians from Teddy Wilson, Benny Goodman, and Buddy Rich to Charlie Parker, Charles Mingus, and Quincy Jones.
 In 1992, he was inducted into the Alabama Jazz Hall of Fame, and was awarded the National Medal of Arts in 1996.
Bill Robinson is an African-American tenor jazz singer based in New Jersey who is notable for having a long career and for continuing to perform in his 80s.
 His voice has been described as "gleaming" and "lustrous" with a "sure sense of swing".
 He has performed with jazz pianist Betty Liste, jazz guitarists John Zweig and John Carlini, violinist Marion Mansfield, mandolinist Don Stiernberg, Brian Glassman, and many others.
 He sings a variety of genres, including the Great American Songbook, jazz standards, bluegrass music, classical music, gypsy music, Brazilian music, and others.
 He has performed at the Apollo Theater in New York.
 He has opened for comedian Jackie Mason and jazz vibraphonist Lionel Hampton.
 As a youth, Robinson began singing at the age of six, and heard great singers such as Louis Armstrong and Cab Calloway.
Gary Burton (born January 23, 1943) is an American jazz vibraphonist, composer, and educator.
 Burton developed a pianistic style of four-mallet technique as an alternative to the prevailing two-mallet technique.
 This approach caused him to be heralded as an innovator, and his sound and technique are widely imitated.
 He is also known for pioneering fusion jazz and popularizing the duet format in jazz, as well as being a major figure in music education from his 30 years at the Berklee College of Music.
Groove Merchant was an American jazz and R&B record label during the 1970s.
 It was run by producer Sonny Lester and distributed by Pickwick Records.
 Notable artists included Chick Corea, O'Donel Levy, Buddy Rich, Jimmy McGriff, and Lionel Hampton.
 Lester would later close Groove Merchant and restructure it as Lester Radio Corporation, or LRC, and have it distributed for a time by TK Records.
 Lester still retains the rights to the Groove Merchant/LRC back catalog and independently distributes them on compact disc.
Marjorie "Marjie" Hyams (August 9, 1920 – June 14, 2012) was an American jazz vibraphonist, pianist, and arranger.
 She began her career as a vibraphonist in the 1940s, playing with Woody Herman (from 1944 to 1945), the Hip Chicks (1945), Mary Lou Williams (1946), Charlie Ventura (1946), George Shearing (from 1949 to 1950), and led her own groups, including a trio, which stayed together from 1945 to 1948, performing on 52nd Street in Manhattan.
 The media, marquees, and promos often spelled her first-name "Margie;" but, she insisted that it was spelled with a "j."
Charlie Shoemake (born July 27, 1937, Houston, Texas) is an American jazz vibraphonist.
 He played in George Shearing's Quintet for seven years, starting in 1967.
 He also played vibes on the soundtrack of the Clint Eastwood film "Bird".
 He is the Director of the Central Coast Jazz Institute.
 His wife Sandi Shoemake is a jazz singer and sings on many of his albums.
Stefon Harris (born March 23, 1973) is an American jazz vibraphonist.
 In 1999, the "Los Angeles Times" called him "one of the most important young artists in jazz" who is "at the forefront of new New York music" and "much in demand as a star sideman".
 Harris has played with several jazz luminaries including Kenny Barron, Steve Turre, Kurt Elling, and Charlie Hunter, in addition to releasing several of his own critically well-regarded albums.
Chicago 'n All That Jazz (subtitled Big Band Jazz of the Broadway Musical) is an album by American jazz saxophonist Lee Konitz performing John Kander and Fred Ebb's songs from the Broadway musical "Chicago" recorded in 1975 and released on the Groove Merchant label.

Question: Groove Merchant included which jazz vibraphonist as one of its artists?
Answer: Lionel Leo Hampton