Klaus Voormann
Klaus Voormann (born 29 April 1938) is a German artist, musician, and record producer. He designed artwork for many bands including the Beatles, Harry Nilsson, the Bee Gees, Wet Wet Wet and Turbonegro. Voormann's most notable work as a producer was his work with the band Trio, including their worldwide hit "Da Da Da". As a musician, Voormann is best known for being the bassist for Manfred Mann from 1966 to 1969, and for performing as a session musician on a host of recordings, including "You're So Vain" by Carly Simon, Lou Reed's "Transformer" album, and on many recordings of the former members of the Beatles.
Klaus Voormann
Voormann's association with The Beatles dates back to their time in Hamburg in the early 1960s. He lived in the band's London flat with George Harrison and Ringo Starr after John Lennon and Paul McCartney moved out to live with their respective partners. He designed the cover of their album "Revolver", for which he won a Grammy Award. Following the band's split, rumours circulated of the formation of a group named the Ladders, consisting of Lennon, Harrison, Starr and Voormann. This failed to materialise; however, all four would-be Ladders (plus Billy Preston) performed on the Starr track "I'm the Greatest", and Voormann did play on solo albums by Lennon, Harrison and Starr, as well as briefly being a member of the Plastic Ono Band. In the 1990s, he designed the artwork for "The Beatles Anthology" albums.
The Concert for Bangladesh (film)
The Concert for Bangladesh is a film directed by Saul Swimmer and released in 1972. The film documents the two benefit concerts that were organised by George Harrison and Ravi Shankar to raise funds for refugees of the Bangladesh Liberation War, and were held on Sunday, 1 August 1971 at Madison Square Garden in New York City. As well as notable performances from Harrison and Shankar, the film includes "main performer" contributions from Harrison's fellow ex-Beatle Ringo Starr, Billy Preston and Leon Russell, and a surprise walk-on from Bob Dylan. Other contributing musicians include Ali Akbar Khan, Eric Clapton, the band Badfinger, Klaus Voormann, Jesse Ed Davis, Jim Horn and Jim Keltner.
The Concert for Bangladesh (film)
The film was the final part of Harrison's "pioneering" aid project for the people of former East Pakistan, following his "Bangla Desh" charity single, the UNICEF benefit concerts, and a triple live album of the event credited to "George Harrison and Friends". "The Concert for Bangladesh" was produced by The Beatles' Apple Films; after delays caused by problems with inadequate footage from the event, it opened in US cinemas in the spring of 1972. The film was released on DVD in 2005 accompanied by a newly created documentary feature, "The Concert for Bangladesh Revisited with George Harrison and Friends", which included recollections from many of the project's participants and contextual input from then UN secretary-general Kofi Annan, US Fund for UNICEF president Charles Lyons and Live Aid founder Bob Geldof.

Question: The Concert for Bangladesh included what German artist, musician, and record producer who designed artwork for many bands, including the Beatles and Bee Gees?
Answer: Klaus Voormann