John Weaver created three busts of which US fleet admiral?
John Weaver (artist):  He was known for creating a statue of Charles Marion Russell at the National Statuary Hall Collection, and three busts of Chester W. Nimitz for the United States Navy. Chester W. Nimitz: Chester William Nimitz, Sr. ( ; February 24, 1885February 20, 1966) was a fleet admiral of the United States Navy.
Chester William Nimitz, Sr.