Dissembler

[T]he Earl vvas the vvorſe Philoſopher, being a great Reſenter and a vveak Diſſembler of the leaſt diſgrace: […]

Source: wiktionary

[Winston] Churchill, in this telling, was not just a racist but a hypocrite, a dissembler, a narcissist, an opportunist, an imperialist, a drunk, a strategic bungler, a tax dodger, a neglectful father, a credit-hogging author, a terrible judge of character and, most of all, a masterful mythmaker.

Source: wiktionary