http://en.wikipedia.org/wiki/Dennis_Wilson

Dennis Carl Wilson (December 4, 1944 – December 28, 1983) was an American rock and roll musician best known as a founding member and the drummer of The Beach Boys. He was a member of the group from its formation until his death in 1983.

In contrast to his bandmates, which included his brothers Brian and Carl, and his cousin Mike Love, Dennis often did not sing backup vocals at live performances, though he did so in the studio. His prominence in the group increased as their careers went on, sometimes singing lead, and as a writer towards and into the 1970s.