George Harrison, also known as the "Quiet Beatle", was always overlooked. He was an accomplished
lead guitarist (which surprises a lot of folks, who thought that
John Lennon was lead - he was the
rhythm guitarist), yet his
songwriting abilities were overlooked because of the long shadow cast by his band-mates,
Paul and John. It was always a struggle to get his tunes on the
albums, and it helped lead to the breakup of
the Beatles.
Additionally, George introduced much of the West to Eastern culture, including the music and spiritualism. He played the Sitar, and it can be heard on several of the last Beatles songs.