Headmaster of Hogwarts throughout most of the Harry Potter series, it is safe to say that Dumbledore is the most powerful professor at Hogwarts. With his Elder wand, Dumbledore managed to get away both times he was threatened imprisonment at Azkaban. He could also duel Voldemort and hold his ground.
For example, in Harry Potter and the Deathly Hallows – Part 2, Snape was reluctant to fight McGonagall when the latter took him to a duel in front of Hogwarts students. Both characters had their strengths, but the last Harry Potter movie proved Snape was the strongest Hogwarts professor.
Dumbledore may have been a legendary wizard, but he can't be compared to, well, Merlin, a wizard so legendary even Muggles know of his exploits. Merlin was the world's most famous wizard, and, arguably, the world's most powerful. Fellow Slytherins, you can be proud of our house— the great Merlin himself was one of us!
Formerly known as Tom Marvolo Riddle, Lord Voldemort was the most formidable evil wizard in the entire universe. Until Harry Potter, Voldemort's magical prowess was practically unmatched, and no one could stand a chance against him.
Winner: Snape
The kind of versatility in magical abilities that Snape displayed was almost around the level of Albus Dumbledore and Voldemort, making him easily more powerful than the average wizard and even the members of the Order of the Phoenix and the Death Eaters.
Severus Snape might have pretended to serve Voldemort (while in fact, as we all know, working as a double agent for Dumbledore), but there's almost no question he was more powerful than the Dark Lord.
Bellatrix is (kind of) in her prime, while McGonagall is old. We should also know that although Bellatrix is evil, it doesn't mean she's stupid. But seeing that McGonagall is old, we can correctly assume that she's experienced. I'd say McGonagall wins the duel, no questions asked.
Tom Riddle/Voldemort
Professor Dumbledore once said that Tom Riddle, a.k.a. Lord Voldemort, a.k.a. "He Who Must Not Be Named" (Ralph Fiennes/Hero Fiennes Tiffin/Christian Coulson), was the most brilliant student that Hogwarts has ever known.
It's fair to say that Dolores Umbridge is the most-hated character in the Harry Potter series. Her blind loyalty to the Ministry of Magic and her condescending attitude towards her students immediately made her the most unlikeable teacher in Hogwarts' long and complex history.
Professor Severus Snape was Harry's least favorite teacher. Harry also happened to be Snape's least favorite student.
1 Hermione Granger Is The Smartest Witch Of Her Age And The Strongest Hogwarts Student In The Series.
Minerva McGonagall
McGonagall was among the oldest and most experienced teachers in Hogwarts, and she was a worthy successor to Dumbledore as the headmistress. In fact, she has proven her mettle against Voldemort and survived a duel against him.
Harry's other best friend, the bookish and kind Hermione Granger can't be beaten in the classroom. Harry recognizes her as his year's best student and even said so at some point. But while Hermione can ace any test, she can't quite keep up with Harry on the battlefield.
In the Harry Potter series, had Minerva McGonagall and Severus Snape both gone all out in a duel, who would have won? Severus Snape would win hands down, as evidenced by the clash of the seventh book or the eighth film.
Additionally, Snape is more skilled in potions than Dumbledore, making him a powerful contender for Albus's spot on the list. Albus, however, edges out Snape thanks to the former's greater base power, and deeper understanding of the complexities of “old” magic.
Dumbledore almost certainly. Snape is a good duelist in my opinion but definitely a cut below the three powerhouses of the series. Dumbledore's age doesn't have any of the comventional drawbacks from what we've seen in Half-Blood Prince.
Often a controversial figure, Dumbledore was undoubtedly the most powerful Gryffindor in the Harry Potter series.
When it comes to actual ability as a wizard, a case can certainly be made that Draco Malfoy is more talented than Harry. The only thing that Potter beats Draco at is his flying ability on a broomstick, but even then Draco pushes him all the way.
During book 7 is definitely Voldemort. By the time of the Cursed Child, it's probably Delphini. As for your other questions: Dumbledore was not powerful because of the Elder Wand. He took it from Grindelwald after defeating him in a duel (with a regular wand).
Barry Wee Willie Winkle (b. 14 August, 1236) was the oldest known wizard in the 1990s, when he reached the age of 755. To celebrate the occasion, he held a massive party, inviting every wizard and witch he had ever known, a total of thirty million people. It was one of the biggest parties in wizarding history.
The Elder Wand, the most powerful wand ever created, is one of three objects that make up the Deathly Hallows, including the Cloak of Invisibility and the Resurrection Stone. The Elder Wand was 15 inches long, formed by Death himself, made of elder wood, and contained the center of the tail-hair of Thestral.