As to tactical brilliance, Alexander goes back on the list with Hannibal and Caesar. Cannae is still studied and IMHO was the model for the first Gulf War plan.
In more modern times, Frederick the Great and Napoleon.
I agree the WWII Pacific campaign is often overlooked. I am a big fan of Nimitz. When his back was against the wall he threw everything on the line at Midway. Then he put together the most innovative strategic plan of the war.
As distasteful as it is I'd put Khalid on the list for his accomplishments, but to be fair he was attacking two empires that had exhausted each other in earlier battles.
Save the best for last - Washington. He may not have been the best tactician, but was a brilliant leader. He really was the indispensable man in creating the United States. No one else could have held that army together in my opinion.
Probably not, Lord Admiral Nelson or NOBODY!
Crossing the T, the Egyptian gambit, etc. The guy was a genius at naval warfare!