[quote=@Sabotage]
Genghis Khan and Erwin Rommel for their brilliant military strategy.
[/quote]

Tactics, not so much strategic since both ran into huge logistics issues.

MacArthur, [url=https://www.youtube.com/watch?v=-BS-IwaQmr4]because the logistics of getting the 32nd Infantry Division into and across New Guinea[/url], and the later Inchon landings/Pusan-Perimeter where pretty epic.
-Cons: Tended to disobey the president's direct-orders, a lot.

George C. Marshal
7 words: GI bill, Marshall Plan, and Berlin Airlift.
-Cons: Pearl Harbor

[url=https://www.youtube.com/watch?v=WpSQ1CCLu0k]Would you like to learn more?[/url] [url=https://www.youtube.com/watch?v=pJC5Q9b7TXE]Put your hand on that wall.[/url]
tl;dr: [url=http://en.wikipedia.org/wiki/Battle_of_Buna%E2%80%93Gona#Allied_casualty_rate_exceeds_Guadalcanal]110% combat-casualties and 654 days on the line without relief[/url].

MacArthur: Trading US-divisions for time he didn't have.