merlin from King authur man... U never read that book? it was mad good. =D they making a movie of it of it thats showing like in a week or so...

We really can't compare gandalf and dumbledore... they from 2 different era of wizard times... and as always the old era is always more powerful than the new era people. (but techenally[sp?] voldemort is most powerful in harry potter series)