[swolf]

Hannibal, Chengis Khan & several of his staff most notably Subudai, Tamerlane, Gustavus Adolphus, John Churchill, Ulysses Grant, Douglas MacArthur, Chester Nimitz, Marshall Zhukov...

[Gumption]

Chester Nimitz is the most underrated

Rommel was the most overrated.

[blanknoone]

Not entirely generalship, but I have to give the nod of most influential to Gustavus Adolphus.

[Arkie2]

several of his staff most notably Subudai, Tamerlane, Gustavus Adolphus, John Churchill, Ulysses Grant, Douglas MacArthur, Chester Nimitz, Marshall Zhukov

Wow! I didn't know those guys all served on Ghengis Khan's staff! You coulda knocked me over with a feather!

[JasonC]

Tamerlane was basically just a butcher who fought smaller forces with huge ones and destroyed everything in his path, like a swarm of locusts. He trapsed across his own domains on missions of conquest, and left nothing but deserts and disunity. He was not a successful commander, he just killed a lot of people to no purpose. Note, this is not true of the earlier Mongol leaders, some of whom had real military accomplishments. But largely due to the weakness of their enemies and the native superiority of steppe nomad warfare at that time - whenever they got their act together politically. Not things any of them invented, incidentally.