I read Foundation pretty recently. I'm not sure I'd describe him that way. Plus he is the one who coined and followed the adage "Violence is the last refuge of the incompetent". I described him as shrewd because he figured out before Seldon revealed it in the Vault that the Encyclopedia was not Seldon's main goal. Partly shrewd and partly because he was virtually the only person in the Foundation who had any psychology training (courtesy of one of Seldon's group who had come to Terminus when it was set up).