@comicgirl21: Oh I had a post but it got deleted. Like before I posted it damnit. More sources state saurons the strongest. No point arguing Gandalf vs third age Sauron without ring. No physical form and Gandalf is tied to his physical form. Manwe made it so. Also Gandalf got captured by Saurons spirit sooooo??? Also there’s a source that claims Sauron would beat all five istari when they came to middle earth which is why they didn’t just confront him directly. Thanks for joining the supporters of lotr and the silmarrilion on this site. Not too many of us.
Sorry to hear ur post got deleted. Im sure it was pretty good. However you still need to carefully study is the quote saying about Gandalf the Grey or the White. Most of quotes that state that Sauron was > Wizards are talking about the Wizard order as it was before Gandalf gained the amp, including the one you're talking about Sauron beating all Istari. Im wont argue Gandalf or even entire Istari order could match Sauron in his prime before Gandalf became White. Im not even talking about Gandalf the White vs Sauron in his Prime. I'm just talking specifically about Gandalf the White vs Sauron without his ring, because this is the situation Tolkien was talking about and this is the situation from the timeline LOTR is taking place. At the time of Gandalf becoming the White he became the most powerful Maiar currently in Middle Earth, having surpassed both Saruman (which he proved) and Sauron, as he was weaker without the ring. How does Gandalf the White scale to Sauron in his Prime? Im not so sure. But my guess would be, they would be somewhat close in power. A fight between true form Gandalf the White and Prime Sauron would be somthing to see.
Also your welcome, Im the first in line to support LOTR and silmarillion any day. It is after all the fatherly story to all classic fantasy and one of the greatest stories ever told.