Which famous jazz musician was known for playing a 'bent' trumpet?

The very famous jazz musician who was known for playing a 'bent' trumpet was Dizzy Gillespie (1917—1993). John Birks "Dizzy" Gillespie was an American jazz trumpeter, bandleader, composer, and singer. He was a trumpet virtuoso and improviser, building on the virtuoso style of Roy Eldridge. Gillespie was the musician who added layers of harmonic and rhythmic complexity previously unheard in jazz.

Gillespie was born in Cheraw, South Carolina; he died in January 1993 in Englewood, New Jersey, USA. During his life, he played in a number of bands, including those led by Cab Calloway, Ella Fitzgerald, Earl Hines, Duke Ellington, and Billy Eckstine. He also took part in many late-night jam sessions at Minton’s Playhouse, a New York City nightclub, and was among the club’s regulars who pioneered the 'bebop' sound and style.

Gillespie was known to associate and work with Charlie Parker, Charlie Christian, Thelonious Monk, Max Roach, and others. In 1944 the 1st bebop recording session included Gillespie’s “Woody ’n’ You”. The session featured Gillespie and Coleman Hawkins. Ultimately, Charlie Parker and Gillespie were regarded as co-founders of the bebop movement (1940s — early ’50s).

Besides his bent-bell trumpet, other personal trademarks were Gillespie's puffy cheeks when playing, his horn rim glasses, and his goatee. Regarding music, his greatest bebop hits include: “Salt Peanuts”, “Con Alma”, “Groovin’ High”, “Blue ’n’ Boogie”, “A Night in Tunisia”, and “Woody ’n’ You”.