Darth Vader because he can literally bend reality as seen in the cannon Star Wars the clone wars tv show. Because he is the chosen one (confirmed by George Lucas) he obtains the power of both sides and he was supposed to become the supreme god of the force keeping the light and dark at bay. And the light suber enhanced by his force wielding powers. He could just take grasp of goku and make him bleed and die in the most painful way possible.