I cannot say for the Germans, and natural bias makes me think that all British soldiers are inherently better Americans...
I have to agree with many previously and say Slim. Although, he is often overlooked, because he was in command of the "Forgotten" 14th Army. He didn't command in the European Theatre, so is less studied (Monty gets a mention for the struggle to defeat Germany in History classes. British Imperial, and hence Imperial Defence, history is overlooked in Scotland). Slim did not (as far as I am aware) command, fight below, or fight alongside Americans in his most famous struggles...