More for your four founders fandom:
Godric is from a clan in Scotland(basically look up Jamie Frasier from outlander and that's how Godric looks like) Rowena is half Korean and comes from a pure blood family in Korea. Helga comes from small town in the country side of Britain shes a muggleborn. Salazar comes from a clan in China. His family was killed when coming to Britain and found out they were magic.
Helga can drink anyone under the table. Her family owned a 🍺 tavern.
The four founders all met each other by chance.
They became friends after saving Salazar from being hanged for witchcraft.
They constantly steal people horses because they have to get away fast from shenanigans they cause(mostly Salazar and Godrics fault.
Rowena has stabbed several people. Mostly for being inappropriate towards her and Helga, but mainly she can't stand idiots.
Helga is the sweetest one in the group. But she's also ride or die
The four founders have gotten in trouble with pirates, the salem witch trials council, several witch hunters, a goblin Godric owes money to for stealing something from him(cough a certain sword), Rowenas very wealthy family, and one very very angry warlock.
Salazar will rather die than admit he finds Godric hot( especially when he's in a kilt)
The literally find the land wear they'll built hogwarts by accident.
Unfortunately their ethnicity is what I used from canon after doing extensive research on what available info I could find. But I haven't described them in detail bc I knew a lot of readers would prefer a more diverse set of characters. As for others, I can definitely see some good side and filler chps.
You should check out the fic, I have already written 80k words. So the world building is already established. 😭
Though Rowena and Helga are literal queens so I think it would match to how you think of them.
I really appreciate the suggestions though! Please keep them coming. @darkcrowprincess