In pure technical skill, Dooku's and Kenobi's respective forms are unmatched. Assuming equal augmentation with Sidious being forced to use the one style, he would lose. Maul's Juyo is pretty proficient, but I'm not sure if he is stylistically superior to Sidious. They seemed to be equally matched in their fight. But yeah, Sidious tends to overwhelm his opponents with speed and strength rather than flawless technique in a certain style.