Question: John Weaver created three busts of which US fleet admiral?

Context paragraphs:
Admiral of the fleet: An admiral of the fleet or fleet admiral (sometimes also known as admiral of the navy or grand admiral) is a military naval officer of the highest rank.  In many nations the rank is reserved for wartime or ceremonial appointments.  It is usually a rank above admiral (which is now usually the highest rank in peace-time for officers in active service), and is often held by the most senior admiral of an entire naval service.

Admiral flote: Admiral flote (lit.  Admiral of the Fleet) is the fifth and highest Admiral of the Croatian Navy.  This officer is referred to as, and is considered the equivalent of, a five-star Fleet Admiral.  The insignia for a Croatian Senior Admiral is two thick rank stripes on both the sleeve and shoulder board.  Between 1995 and 2002, the rank was called Stožerni admiral, meaning "Staff Admiral", analogous to "Stožerni general" for the ground forces.

Nora W. Tyson: Nora Wingfield Tyson was a United States Navy officer.  In 2015, she was installed as the new commander of the Navy’s Third Fleet, making her the first woman to lead a U.S. Navy ship fleet.  She retired from service in 2017.  Tyson previously served as the commander of Carrier Strike Group Two (CCSG2), from July 29, 2010 to January 12, 2012; she was the first female commander of a U.S. Navy Carrier Strike Group.  She then served as Vice Director of the Joint Staff beginning in February 2012.  In July 2013 she was promoted to Vice Admiral and named as Deputy Commander, US Fleet Forces Command.

Chester W. Nimitz: Chester William Nimitz, Sr. ( ; February 24, 1885February 20, 1966) was a fleet admiral of the United States Navy.  He played a major role in the naval history of World War II as Commander in Chief, United States Pacific Fleet (CinCPac) and Commander in Chief, Pacific Ocean Areas (CinCPOA), commanding Allied air, land, and sea forces during World War II.

Weber–Weaver Farm: Weber–Weaver Farm is a historic home and farm located at West Lampeter Township, Lancaster County, Pennsylvania.  The property includes the Hans Weber House (1724), the Weber summer kitchen (c. 1800), the Weber barn (c. 1724), The John Weaver House and summer kitchen (c. 1765), the Weaver barn (c. 1904), the Weaver shed (c. 1904), and the Weaver garage (1930).  The Hans Weber House is a stone dwelling modeled on the Hans Herr House in its Germanic style.  It measure 36 feet by 34 feet, and was enlarged to a full two-stories and renovated between 1790 and 1810.  The John Weaver House was built as a two-story, Georgian style dwelling, subsequently enlarged and modified during the 19th and 20th centuries.

National Museum of the Pacific War: The National Museum of the Pacific War is located in Fredericksburg, Texas, the boyhood home of Fleet Admiral Chester W. Nimitz.  Fleet Admiral Nimitz served as CinCPAC, Commander in Chief, United States Pacific Fleet during World War II.  The six acre site includes the Admiral Nimitz Museum which is housed in the old Nimitz Hotel and tells the story of Fleet Admiral Nimitz beginning with his life as a young boy through his naval career as well as the evolution of the old hotel.

John Weaver (artist): John Barney Weaver (March 28, 1920 – April 10, 2012) was a sculptor from Anaconda, Montana.  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.

Nimitz-class aircraft carrier: The "Nimitz"-class supercarriers are a class of ten nuclear-powered aircraft carriers in service with the United States Navy.  The lead ship of the class is named after World War II United States Pacific Fleet commander Fleet Admiral Chester W. Nimitz, the U.S. Navy's last fleet admiral.  With an overall length of 1092 ft and full-load displacement of over 100,000 long tons, they have been the largest warships built and in service.

Fleet admiral (United States): Fleet admiral (abbreviated FADM), officially known as "Fleet Admiral of the United States Navy", is a five-star flag officer rank in the United States Navy.  Fleet admiral ranks immediately above admiral and is equivalent to General of the Army and General of the Air Force.  Although it is a current and authorized rank, no U.S. Navy officer presently holds it, with the last living U.S. Navy fleet admiral being Chester W. Nimitz, who died in 1966.

Admiral of the fleet (Russia): Admiral of the fleet or fleet admiral (Russian: aдмирал флoта , "admiral flota") is the highest naval (deck) rank of the Russian Federation.  It is the equivalent of the Soviet naval rank of admiral of the fleet and the present Russian rank of general of the army.  The rank is roughly equivalent to 4-star admiral ranks of other nations.  Marshal of the Russian Federation is the only superior rank in the Russian armed forces.

Supporting paragraphs: John Weaver (artist) Chester W. Nimitz
Answer: Chester William Nimitz, Sr.