Good Slytherins

[Mathias Giovanni]

Good Wizards from House Slytherin
Merlin - Championed Muggle Rights.
Andromeda Tonks - Cousin to Sirius - Married a muggle - In the Order of the Pheonix
Severus Snape - Obviously key to defeating the main villain.
Horace Slughorn - Fought the dark lord.
Albus Severus Potter - Harry Potters son.
Astoria Greengrass - Married Malfoy
Scorpius Hyperion Malfoy - Malfoys son.
Adrian Pucey - Classmate to Harry & Ron. Played fair, didn't foul nor attack.
Leta Lestrange - Magical Beasts storyline.
Cedrella Black - Mother of Arthur Weasley

Phineas Black - Supported Muggle rights. (Currently Head Master this game). But could be mixed up with his son who may have had the same name.


Bad Wizards from the other Houses
Peter Pettigrew - Griffindor
Quirinus Quirrell - Ravenclaw
Gilderoy Lockhart - Ravenclaw
Barty Crouch Junior - Ravenclaw
Rita Skeeter - Ravenclaw

Hufflepuff has no bad wizards listed
Lore wise says they have produced the least of all the houses for bad wizards. None are known in current canon that are mentioned.

Feel free to let me know and I'll update.

[Rainy Kitten]

Don't forget Lockheart, he was a Ravenclaw too, though am starting to think Ravenclaws are the sneaky bad guys here XD

[Kenshiro]

I will absolutely not be doing Slytherin any favors on public image. I solemnly swear I am up to no good.

[Mathias Giovanni]

Originally posted by Rainy Kitten:

Don't forget Lockheart, he was a Ravenclaw too, though am starting to think Ravenclaws are the sneaky bad guys here XD

updated

[Castyles]

Slughorn was from Slytherin.

Also Albus, Harry's son.

[Mathias Giovanni]

Originally posted by Castyles:

Slughorn was from Slytherin.

Also Albus, Harry's son.

Updated

[Scorpio]

Tom Marvolo Riddle, Lucius Malfoy, Draco Malfoy, Regulus Black

[roymaster45]

I could have sworn Barty Crouch Jr. was in Slytherin, but it's been a while, so I don't remember.

Originally posted by Scorpio:

Tom Marvolo Riddle

...please tell me you know what happened to him by the time the books happened. (Also, name one good thing Lucius Malfoy did.)

[Mathias Giovanni]

Originally posted by roymaster45:

I could have sworn Barty Crouch Jr. was in Slytherin, but it's been a while, so I don't remember.

https://harrypotter.fandom.com/wiki/Bartemius_Crouch_Junior

Started looking for it and it looks like it is unlisted. There isn't a canon reference. He was highly intelligent though 12 owls.

[The Former]

Originally posted by Mathias Giovanni:

Hufflepuff has no bad wizards listed

They 'bout to. *pops collar*

[Mathias Giovanni]

Originally posted by Lockfågel, Paradoxriddaren:

Originally posted by Mathias Giovanni:

Hufflepuff has no bad wizards listed

They 'bout to. *pops collar*

Haha! There you go! No one will ever suspect you.

[Prawn]

<Hufflepuff has no bad wizards listed>

Hold my beer!

[BounceBanana]

Regulus Black

[PocketYoda]

Originally posted by Prawn:

<Hufflepuff has no bad wizards listed>

Hold my beer!

Thats because they are the true heroes.

Says here Barty Crouch Jr was Ravenclaw.
https://prince-of-slytherin.fandom.com/wiki/Bartemius_Crouch_Junior

[Alby]

Didn’t know Harry son was a slytherin that’s pretty neat

[Mathias Giovanni]

Originally posted by PocketYoda:

Originally posted by Prawn:

<Hufflepuff has no bad wizards listed>

Hold my beer!

Thats because they are the true heroes.

Says here Barty Crouch Jr was Ravenclaw.
https://prince-of-slytherin.fandom.com/wiki/Bartemius_Crouch_Junior

I knew I saw it somewhere. Thanks.