After this weekend, I just have post;
William, Prince of Orange, the future King William II. His decisions and more importantly his actions really helped decide the Waterloo campaign. Certainly not a military mastermind au pair with Napoleon or Suvarov, but a fantastic and beloved leader. And of course he was brave to the point of reckneckless - which, eventually, got him wounded.
And no, he wasn't the stupid spoiled richy - He had done the Prussian militiary academy, Oxford (or Eton, I always get confused) and served in the British army in Spain and southern France. Maybe not quite enough experience for a Corps commandship, but still.