Eddis, Attolia, Sounis

You know, I never would have thought of there being similarities between Gen and Lord Peter, but now that you mention it, definitely! And Sir Percy, absolutely. The disguises, obviously, but also in playing the long game. Wheels within wheels, so to speak.

I think Thomas (aka The Mysterious Marquis) of the Kate & Cecilia books would strive for all those traits, but unfortunately has a tendency to miss the mark too often (mostly by leaving Kate out of his calculations).