Greetings!
Hmm....let me think of that.
I don't know if I can actually rank them, but I will give you the top ten that I know of.
Raymond Spruance Admiral, US Navy, WWII - seldom spoken about, but was a GENIUS in military strategy and Tactics (particularly in the Battle of Midway)
Chester Nimitz, Fleet Admiral, US Navy, WWII - Also a quiet hero, though not as silent as Spruance. His optimism and coolness helped create a cabinet that took the war to the Japanese.
George S. Patton, General, US Army, WWII - Wild and bombastic, Patton backed up his boast with engenius strategy and tactics, particularly in the battle of the bulge
Dwight D. Eisenhower, General of the Army, WWII - Like Nimitz, he had to carefully maintain a very ticklish group of men who were easily enraged to fight each other instead of the Germans. His strategy for Normandy was brilliant.
Ulysses S. Grant - General, Civil War - Grant was not so much a genius strategist or tactician, but he did do something that nearly all other Union General officers seem to squander - he fought. His eye on the prize gained the victories in Shiloh, Vicksburg, and the invasion of Virginia. Even when he lost battles, he moved forward, pushing the confederacy backward and ultimately to defeat
William Tecumseh Sherman, General, Civil War - Sherman knew what it took to fight the confederacy. He was the only person to know at the outset of the Civil war that many people would die. And even his estimate did not come close to the real numbers. He knew how to break the will for the south to fight and made his battles count hard against the Confederacy.
Robert E. Lee - Lieutenant General, Confederate States of America -
Lee fought absolutely brilliant tactics, though his strategies were a bit rusty. Holding out against overwhelming numbers of troops, and materiels for as long as he did must deserve a salute. His one flaw, as I see it is that he had to know that there would come a time that his army can no longer hold out against the Union. Yet he kept sending in troops to their slaughter.
Chief Joseph - With no military training, he conducted a brilliant war against the US Cavalry. He, too was very much outnumbered and overwhelmed by lack of materiel, yet he made great strides to make the escape of his tribe to Canada. He was just one day away from Canada when finally forced to surrender.
Isoruko Yamamoto, Admiral, Japanese Imperial Navy, WWII - Yes, his
Pearl Harbor strategy nearly worked, and his navy did run rampant, virtually unchecked for six months, but it all ground to a halt at Midway.
Yamamoto knew he only had six months to gain an overwhelming superiority in the sea or he would be crushed. He was right.
Erwin Rommel, Field Marshall, German Weirmacht, WWII - His tank tactics were supremely orchestrated. He fought brilliantly in most of his battles, but did get overwhelmed in North Africa. He also knew when Normandy was invaded how deadly the campaign would be to the Germans.