Cho Chang- (if you want to ignore the fact her name is racist we can do) but a sweet, intelligent Asian girl who cries all the time (we're clearly supposed to forget that her boyfriend just died and Harry jumped right on in there) and has no other character development.
Parvati Patil becomes absorbed by divination early on, seen even in the wizarding world as a nonsense and feeding into "mystical" Asian stereotypes, and Padma just disappears. In the books, they are at least "pretty", which seems to be the only descriptor they really get, but the film undoes that because no-one could be bothered to actually dress them properly and wanted to focus to stay on Hermione.
The Irish characters (Seamus Finnigan, but also Luna after the casting decision was made and signed off explicitly by JK)- one is an idiot who is always blowing something up, the other is a lovable eccentric who believes in a wide range of conspiracy theories and would be a tin-foil hat wearer in the muggle world.
There are very few characters explicitly identified as black in the books but we do have Dean Thomas who JK has said was black although he isn't defined as such in the UK version, which is a problem in itself. He's not too bright, always in trouble and hangs out with Seamus. His Dad left him.
And Kingsley Shacklebolt...do I really need to go into why that's problematic?
Fleur is hyper-sexualised and extremely passionate.
Lavender Brown was black in the film until the filmmakers realised she had some lines, then she was recast as white!
Don't get me started on the hook-nosed, money-obsessed goblins.
As an aside, JK Rowling has explicitly confirmed that lycanthropy was a metaphor for HIV/AIDS. Apparently, likening AIDS sufferers to people who turn into uncontrollable werewolves who attack people in the night was meant to REDUCE stigma.
And finally, if you ask me a question I will answer it but if you're replying to my posts just to insult me, then you are wasting your time as I won't respond to it.