It was said, in several books, and in the Phantom Menace and Attack of the Clones, that Anakin Skywalker was the "Chosen One" and was to bring order to the galaxy. Presumably, he was the most "powerful" Jedi, but for Yoda. Later, he was the most powerful Sith Lord after the Emperor, Darth Sidious.
I don't buy that. Why? From A New Hope through Return of the Jedi, Vader clearly had good command of the force and was a good master of the light saber, but he didn't possess the Sith lightning, nor did he demonstrate mastery of the Force like Darth Tyranus/Count Dooku.
In Attack of the Clones, Count Dooku/Tyranus kicked some major ass. He came close to winning in a duel with Master Yoda. Lord Tyranus, IMO, appears to be a much more powerful Sith Lord than either Darth Maul or Darth Vader. Darth Maul was a combat Sith; he was a master of the saber, but not proficient in the Force. Lord Vader was proficient in both Force and Saber, but Dooku appeared to be much more powerful. He had the Sith lightening, all the Jedi arts, the Sith arts, and could move great objects with the Force. Vader only tore a few things off walls and moved smaller objects, deflected blasters, etc. He never demonstrated the might, skill, or sheer power that Lord Tyranus or Lord Sidious exhibited.
So, this begs the question, is Vader truly the most powerful? Who is more powerful, Vader or Dooku? Your thoughts? Please don't be mad at me for this post, but I am trying to figure it out. I'm reading Labryinth of Evil right now, which takes place before Revenge of the Sith. The book has given me more quetions than answers. I'm just trying to clear this out in my head, so please don't be mad.