Interesting. Didn’t he lose that power when made the final Ring of Power, and when he activated it, he threw all of his “life force” in it (cruelty, malignancy etc.)
Yes in order to make the One Ring more powerful than the other rings he had to put his own strength into it. However the elven rings weren't made by Sauron so he couldn't control those (eventually worn by Gandalf, Galadriel, and Elrond), and if I remember right the Dwarfs were too stubborn to be controlled (or something), so only the humans ended up being controlled anyway.