Keith Noel Emerson was an English musician and composer. He played keyboards in a number of bands before he found his first commercial success with the Nice, formerly P. P. Arnold's backing band, in the late 1960s. He became internationally famous for his work with the Nice, which included writing rock arrangements of classical music. After leaving the Nice in 1970, he was a founding member of Emerson, Lake & Palmer, one of the early progressive rock supergroups. Emerson, Lake & Palmer were commercially successful through much of the 1970s, becoming one of the best-known progressive rock groups of the era. Emerson wrote and arranged much of ELP's music on albums such as Tarkus and Brain Salad Surgery, combining his own original compositions with classical or traditional pieces adapted into a rock format. Following ELP's break-up at the end of the 1970s, Emerson pursued a solo career, composed several film soundtracks, and formed the bands Emerson, Lake & Powell and 3 to carry on in the style of ELP. In the early 1990s, Emerson rejoined ELP, which reunited for two more albums and several tours before breaking up again in the late 1990s. Emerson also reunited the Nice in 2002 for a tour. During the 2000s, Emerson resumed his solo career, including touring with his own Keith Emerson Band and collaborating with several orchestras. In 2010 he reunited with ELP bandmate Greg Lake for a duo tour, culminating in a one-off ELP reunion show in London to celebrate the band's 40th anniversary. Emerson's last album, The Three Fates Project, was released in 2012. Emerson reportedly suffered from depression, and in his later years developed nerve damage that hampered his playing, making him anxious about upcoming performances. He committed suicide on 11 March 2016 at his home in Santa Monica, California. Along with British contemporaries Rick Wright of Pink Floyd, Tony Banks of Genesis, Billy Ritchie of Clouds, Rick Wakeman of Yes, and Jon Lord of Deep Purple, Emerson is widely regarded as one of the top keyboard players of the progressive rock era. AllMusic describes Emerson as "perhaps the greatest, most technically accomplished keyboardist in rock history".

https://en.wikipedia.org/wiki/Keith_Emerson