From the list, I would choose Alexander the Great for being able to do so much with very limited resources. I'm not really sure Adolf Hitler or Otto von Bismarck were actually generals though, unless they've done things i'm not aware of.

Erich von Manstein, Erwin Rommel and Heinz Guderian should be in this list.
Why Rommel?

As should be Zhukov, Konev, Chuikov and Rokossovsky.
Likewise, but why any of these?