Albus Dumbledore Dumbledore is one of the most powerful wizards to ever live. His exploits and achievements earned him fame across the Wizarding World and made him a top choice to be Minister for Magic, but Dumbledore choose to spend most of his life at Hogwarts, devoting himself to teaching future generations.
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.
Verdict: Snape Is the Stronger Wizard
McGonagall is surprisingly skilled in the Dark Arts but not on the same level as Snape. She's also most likely incapable of casting the Killing Curse, which puts her at a disadvantage.
Dumbledore might be the most powerful teacher in Hogwarts, but the most powerful brain belongs to Professor Minerva McGonagall of Transfiguration class. In fact, she's the "Hermione" of her generation, that is, the brightest witch/wizard of her age. Professor McGonagall is a treasure trove of knowledge.
One reason for this is that its many professors are extremely powerful wizards who spent years perfecting their craft. By passing their knowledge to an entire generation of students, they helped create many witches and wizards that became more powerful than themselves.
Transfiguration. 'Transfiguration is some of the most complex and dangerous magic you will learn at Hogwarts,' she said. 'Anyone messing around in my class will leave and not come back.
The Head of Slytherin is Horace Slughorn (who left the role to Severus Snape for fifteen years before taking it up again in 1996) and the House's patron ghost is the Bloody Baron.
Professor Slughorn was the Potions master during Tom Riddle's years at Hogwarts School of Witchcraft and Wizardry. As Head of Tom's House, and given his tendency to favour students who displayed remarkable talent, Slughorn became Riddle's mentor, and was likely the professor Tom liked most.
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.
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.
Minerva McGonagall
To be fair, it was McGonagall, Horace Slughorn, and Kingsley Shacklebolt who dueled Voldemort at the same time. Sadly, he incapacitated all three of them after being enraged at the news of Bellatrix Lestrange's death.
Albus Dumbledore is the most powerful wizard in the Harry Potter. Dumbledore seemed like a lovely older man and the Headmaster of Hogwarts who only wanted the best for everyone when Harry first met him.
Experience required at Hogwarts
It may seem like anyone can become a Hogwarts professor, but the minimum age is 21, and Snape was that age when he got the job and become Hogwarts youngest teacher.
Harry's favourite professor, Dumbledore is the reason that Harry is alive. Right from the beginning, when Dumbledore ordered Hagrid to take infant Harry to the Dursleys where he would be the safest, to the end, when he told Harry everything about Voldemort so that Harry could finish him, he was a stellar character.
After being left alone in the Gaunt family hovel, Merope bewitched the Muggle boy she had a crush on, Tom Riddle.
June 13, 1942: Tom Riddle murders Myrtle Warren (a.k.a. Moaning Myrtle) in the first-floor girls' bathroom at Hogwarts School of Witchcraft and Wizardry, sending a piece of his soul into his diary. It becomes his first Horcrux.
Voldemort's greatest weakness in the Harry Potter franchise was that he could never feel love.
Worst: Lucius Malfoy
Lucius Malfoy is pretty clearly a bad person, but he's a perfect example of how banal cruelty and evilness can be. Lucius likes to control, humiliate, and cause people pain, but he's also too weak and self-absorbed to really become one of the evil "greats," so to speak.
Dumbledore also said that Voldemort was probably the most brilliant student Hogwarts has ever seen. Although Voldemort remains highly accomplished and prodigious in skill, he is enormously lacking and highly inept in the most powerful magic, love.
Horace Slughorn (1997 - present) Horace, after being convinced by Dumbledore and Harry Potter, returned to Hogwarts as the Potions master. After Severus killed Dumbledore and became headmaster of Hogwarts, it was decided that Horace was to become the Head of Slytherin House once again.
Harry is given the title of Prince of Slytherin, despite his objections. Harry explains becoming Prince during confrontation with Draco & Prefects.
Moaning Myrtle
Born in the late 1920s to Muggle parents, Myrtle Warren started her Hogwarts life in the early 1940s, where she was sorted into Ravenclaw.