1 Voldemort – Harry Potter He who should not be named makes the number one spot. Voldemort is known for his viciously evil nature. He has wiped out entire generations of Wizards for standing against him, and his power in the dark arts knows no equal.
Lord Voldemort
Tom Marvolo Riddle started both Wizarding Wars, created the Death Eaters and killed Harry Potter's parents. We could go on – he was the most dangerous Dark wizard of all time – but we won't. His horrific achievements are well known.
Lord Voldemort (Ralph Fiennes), aka Tom Riddle, was described by Dumbledore as one of the best students ever to graduate Hogwarts as well as "the most dangerous Dark wizard of all time." Before he had even learned about the existence of the Wizarding world, he was terrorizing his fellow orphans with impressive but ...
Unfortunately, Slytherin has constantly been associated with evil witches and wizards. Most of this negativity surrounding Slytherin came because of the rise of Lord Voldemort and his followers, the Death Eaters.
Some would say that Dolores Umbridge is the most evil character in Harry Potter, but really, it's between Gellert Grindelwald and Lord Voldemort.
1 Lord Voldemort
Lord Voldemort is the scariest villain in Harry Potter, if only because he is the series' overreaching villain who successfully evades death more than once.
Besides Dumbledore, he is also the only wizard ever known to be able to apparate silently. Voldemort was also said to fear one wizard alone, Dumbledore.
However, from the very beginning, Slytherin is always seen as the evil House. This is how Hagrid introduces Slytherin to Harry. In these words alone, it is clear that Slytherin is the House where everyone is evil. However, this isn't the case, as there are characters such as Horace Slughorn and Leta Lestrange.
Peter Pettigrew represents the worst Gryffindor in the entire Harry Potter series.
Hufflepuff's unjust reputation is apparent in the very first installment of Harry Potter when Draco Malfoy remarks before the Sorting Ceremony: “Imagine being in Hufflepuff, I think I'd leave, wouldn't you?” Even Rubeus Hagrid goes as far as to say that the house just consists of “a lot o' duffers”.
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.
1. Albus Dumbledore. Image via Warner Bros.
Although he was intelligent and bookish, Quirinus Quirrell was the weakest of the Hogwarts professors—mostly due to his extremely timid nature.
Noted Dark wizards and witches included: Herpo the Foul, Raczidian, Morgan le Fay, Emeric the Evil, Salazar Slytherin, Merwyn the Malicious, Ekrizdis, Barnabas Deverill, Loxias, Gellert Grindelwald, and Lord Voldemort, as well as the latter's followers, known as Death Eaters.
Draco Lucius Malfoy is a fictional character in J. K. Rowling's Harry Potter series. He is a student in Harry Potter's year belonging in the Slytherin house. He is frequently accompanied by his two cronies, Vincent Crabbe and Gregory Goyle, who act as henchmen.
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.
1. Voldemort. Tom Riddle took the core qualities of Slytherin to new heights, as he became arguably the most powerful dark wizard of all time. He learned how to split his soul and create numerous Horcruxes, thereby making himself immortal as long as the Horcruxes existed.
There were presumably no Hufflepuff Death Eaters (Hufflepuff House boasted of being the only house never to produce any Dark Wizards).
Yes, Hufflepuff dark wizards likely exist. In an interview, JKR confirms that there are people connected with Death Eaters in the houses other than Slytherin, and does not in any way attempt to specifically exclude Hufflepuff.
Peter Pettigrew (a.k.a. Wormtail) is the only Death Eater known to have been in a House other than Slytherin (Gryffindor) while at Hogwarts. There, he was a close friend of Sirius Black, James Potter, and Remus Lupin, although he was the least intelligent and least talented of the group.
Voldemort's greatest fear is death and as a result a boggart takes the form of his own corpse. It is unsurprising that this is Voldemort's biggest fear. After all, he did split his soul up encasing it in various horcruxes just so to keep himself from dying.
Albus Dumbledore
It is not certain what the specific fear is as he is not fearing the death of his sister as she is already deceased and it is suggested that Dumbledore fears that it was him who directly killed his sister in the conflict or that he fears the loss of control that lead to his sister's sudden death.
Corban Yaxley was one of Voldemort's favorite servants. He was often chosen to go on secret missions for the Dark Lord, including the attempt to convert Horace Slughorn. Yaxley was proficient at coercion, manipulation, and the Imperius Curse.