I think I once said my mental Jeeves is pretty much your Jeeves, or getting closer to it all the time. He gets leaner and less broad and is closely approaching your sketches. Bertie, like you said, shifts a lot. I think of him as pretty tall and a little gawky, with blond hair and pale skin. I think he has a prominent nose, or thinks he does at least, and a small forehead probably. People who think they have big noses often have small foreheads.

But other than that he's very fuzzy to me.