Dumbledore vs Gandalf

Ok Ill start. I really dont know enough about Dumbledore to really have a strong case and point, but I am a Lord of the Rings nerd. Gandalf was super powerful, and as long as The Ring/ Sauron lived in Middle Earth, he would be brought back until both never existed. He knew magic, how to wield a sword and brought the proper king to power. He also had Shadowfax, the fastest of all the horses in Rohan. All else aside, he was a great motivator throughout the series, especially in The Hobbit. He made the people around him stronger and helped them to become the best they could be. From what i read, Dumbledore was indeed good, but had some flaws that Gandalf didnt have. Gandalf would survive until the deed was done, while Dumbledore could die (Im assuming they couldnt come back, havent read enough of the series to truly know). But, you could look at it from another perspective. Once the deed is done, Gandalf goes away while Dumbledore can live on. Oh well, i guess ill come back after reading more of the series.