If it weren't for the fact that my vote goes with Fleet Admiral Chester W. Nimitz
Alexander. The victories he pulled off against much larger, and still skilled, enemy forces have yet to be equaled, in my opinion.
Jan. 1905 - Annapolis (19 year old graduate)

~1907 - Probably the Philippines

May 1939 - USS Arizona (Relieving command of Battleship Division 1)

Jan. 1943 - Button Naval Base (Nimitz & "Bull" Halsey)

Early 1945 - Pearl Harbor (Only 1 of 4 five-Star Admirals during WWII, Fleet Admiral)

Fleet Admiral Chester Nimitz died at home in San Francisco on February 20, 1966. A few days before his 81st birthday. His funeral..... Was on his birthday. He was the last surviving five-star admiral.
He literally ended WWII.Decorations and awards from
foreign governments include:
Britain - Order of Knight Grand Cross of the Bath
Greece - Grand Cross of the Order of George I
China - Order of the Grand Cordon of Pao Ting (Tripod) Special Class
Guatemala - LaCruz de Merito Military de Primera Clase
Great Britain - Pacific Star
The Netherlands - Order of Orange-Nassau with Swords in the Degree of
the Knight Grand Cross
France - Grand Officer in the National Order of the Legion of Honor
Cuba - Grand Cross of the Order of Carlos Manuel de Cespedes
Argentina - Order of the Liberator
Belgium - Grand Cross of the Order of the Liberator, Grand Cross Order of
the Crown with Palm, Croiz de Guerro with Palm
Italy - Knight of the Grand Cross of the Military Order of Italy
Philippines - Medal of Valor
Ecuador - Star of Abdon Calderson (1st Class)

Even Chalenge is hinting at Nimitz.......

Im thinking of a commander that defeats his enemies without fighting battles. In fact he can disarm and win against any opponent by using only one word. Rather than make you all appear foolish I will not share his name so that none of you soil your undies or die of embarrassment over the poor souls you have mentioned already. 
AND..... I have confirmation from the FBI & CIA, as well as the Sec of Defense that the only thing to ever defeat Chuck Norris was the USS Nimitz....

So there!