Ummmmm witch is probably Professor McGonagel (sorry I have no idea how u spell that) or Dumbledoor's mother

Wizard is Voldemort, or Dumbledoor's father

But how do u measure power?! It's really a mater if opinion

I think the most powerful wizard/ witch isn’t the one who knows all the spells and has won many battles. The most powerful wizard/witch is one who shows courage bravery kindness and is thoughtful. He/she has to show that they belong in this world. So yes most will pick Harry Potter or Dumbledore but in reality the one who should win is Neville or Ron. Neville stood up to Voldemort and used his friendship with the others to do so. Ron most of the time seemed like he was scared but in the end he was one of the bravest wizards out there. Now witches this would be Hermione or Ginny. They both showed how brave they were and that just because they were girls didn’t mean that they weren’t brave enough to be in the battles that the others were in.

I personally think that power can be measured by different ways.

But those are my own opinions and I hope you understand that everyone has different point of views.

There are lots of powerful witches throughout the wizardring history but here are SOME of them:

1)- ᏞᏆᏞᏞY ᎬᏙᎪNᏚ.

2)-ᎷᎾᏞᏞY ᏔᎬᏚᏞᎬY.

3)-ᏴᎬᏞᏞᎪᎢᎡᏆX ᏞᎬᏚᎢ ᎡᎪNᏩ.

And Also The same goes for the Wizards:

1)-ᏩᎬᏆNᎠᏞᏔᎪᏞᎠ.

2)-ᎢᎾᎷ ᎡᏆᎠᎠᏞᎬ (my favorite character).

3)-ᎷᎬᎡᏞᏆN.

(f͟͟o͟͟r͟͟g͟͟i͟͟v͟͟e͟͟ m͟͟e͟͟ f͟͟o͟͟r͟͟ m͟͟y͟͟ t͟͟e͟͟r͟͟r͟͟i͟͟b͟͟l͟͟e͟͟ s͟͟p͟͟e͟͟l͟͟l͟͟i͟͟n͟͟g͟͟,I͟͟'m͟͟ A͟͟r͟͟a͟͟b͟͟i͟͟c͟͟)

-Muggle-Born,Slytherin Alya🦑.

Tom Riddle worked really hard to be the most powerfull wizard, and despite his choices, you have to give him credit for what he achieved. In the end, he was killed by his own stupid decisions.

I don't know if Dumbledore was really more powerful than Voldemort, but he was a greater mastermind, that's for sure.

I totally can’t completely disagree. You do make a good argument for sure. And I was going to say Tom too, the only reason I didn’t is just bc Tom was always extremely threatened by Albus and just on that principle alone, I attribute that to Albus being slightly more powerful bc of his knowledge. But pound for pound Tom is probably more powerful due to his level of achievements, even if they weren’t “good”; just like Olivander said “Afterall he-who-must-not-be-named did great things... terrible, but great”. So for Tom’s age VS the experience and wisdom/ambition Albus had at that age, I do agree that Tom succeeded him.

Mahaut, hope I spelled your name right I think his toms discussions weren’t stupid at all there just not the best.(what you said is kind of offensive to him,and his my favorite character)

-Muggle-Born,Slytherin Alya🐢.

I love this character too, but I won't pretend he never made mistakes. And his mistakes were terrible considering one of his main goals in life was to be immortal. He praticly killed himself on his own because of how much he messed-up. So yes, as much as I love Lord Voldemort, and despite his great intelligence as a young wizard, he made stupid decisions. I'm sorry If you are offended on his behalf. And be sure that, if all this was real and he was still alive, I would never dare to insult him :D

I think the more confidence and belief you have in yourself, the more powerful your magic is, and I'm basing that on Neville's power growing with his confidence. I'm also going to reference Harry for this in that Harry didn't really have self-esteem issues; even though he was raised to believe that he wasn't special, he still was willing to take on challenges as they came and believed in himself. Both Riddle and Dumbles showed signs of narcissism as children, though life experience helped Dumbles control that, and they both were considered to be outstanding wizards even in their youth. While Draco bragged a lot, he didn't actually have a lot of self-confidence. He tied his self-worth to how others viewed him as opposed to how Harry had learned from an early age to not judge himself by how others (Dursleys, muggle children) see him.

I do think that Riddle was the most intelligent and Dumbles the most knowledgeable. If Harry had the ambition he could be the most powerful, especially due to the hollows, but he's not so he's unlikely to do 'great things' the way Dumbles and Riddle did. We only have his efforts in Hogwarts and against Riddle to judge him by.

There is no exact way to measure power. Each individual has their own strengths and weaknesses, making them powerful in their own way.