rogue
blackguard, charlatan, cheat, con man (informal) crook (informal) deceiver, devil, fraud, fraudster, grifter (slang, chiefly U.S. & Canad.) knave (archaic) mountebank, ne'er-do-well, rapscallion, rascal, reprobate, scally (Northwest English dialect) scamp, scoundrel, scumbag (slang) sharper, skelm (S. African) swindler, villain