Harry - ISFJ- he is DEFINITELY a P
Ron - ESFP
Hermione - ISTJ- still think maybe INTJ
Dumbledore - INFJ- or INTx
Snape - INTJ
Luna - INxP- I think INtP. she is more scientific than creative
McGonagall - ENTJ- ESTJ
L. Malfoy - ENTJ
D. Malfoy - ESTP- ENTJ- he is ALWAYS coming up with plans/ideas even if they're mean. He also lived in the future a lot... dreaming about when he would be a death eater and not come back to school. always striving to be the best... typical ENTJ
N. Malfoy - ESTP- ESFJ. she planned things, she was very very feeling, just not towards Harry who happened to be the main character. but an ESTP wouldnt have thought or cared to tell Voldemort Harry was dead for Draco's sake. not that she wouldnt have cared, but she wouldnt have had an emotionally driven plan. and ESFJs can certainly be cold and snobby
Cedric Diggory - ISTP- Not a chance, typical NFJ
Madam Hooch - ESTP
Katie Bell - ISTJ
Bellatrix Black - ISTP- INxP. she was always coming up with schemes, sadistic ones, yes, but still planning. and she worked off of her values and beliefs, and also, she was OBSESSED with Voldemort and did anything for him, stemming from some sort of infatuation that seems insanely NF gone wrong
Sirius Black - ENTP- when he was younger he seemed one. but in the fifth book- classic ENFP
Tom Riddle/Voldemort - INTJ
Neville Longbottom - INTP- why not INFJ?
Cho Chang - ISFJ- she was certainly an E. always around people, always described as chatting with a group of giggling girls.
Crabbe/Goyle - ISTp
Oliver Wood - ESTP
Rita Skeeter - ESTJ- I dont think so. she didnt really care about rules or traidtions. I'd day ENTJ. she had many plans, schemes, ideas, plots...
James Potter - xSTP
Lilly Potter - INFJ- ENFP. There's a whole article explaining this one. But i think her charasmatic defense of Snape, and her friendship with him alone speaks to ENFP
Olympe Maxime - ESFJ
Olivander - IxTP- definitely an N, so terribly intuitive.
Madam Rosmerta - ESFP
Hepzibah Smith - eSTJ
Argus Filch - ISTP
Gilderoy Lockheart - ENFP- how so?
Horace Slughorn - ESTJ
Ginny Weasley - INFP- or enfp? she never showed much interest in being alone, only shy around harry
Fleur Delacour - ENFP
Remus Lupin - INFP
Nymphadora Tonks - xSTP- she seems F to me. she let her emotions affect her entirely in book 6
Mad-Eye Moody - ISTJ
Barty Crouch, Jr. - INFP- INFJ. He certainly had everything carefully crafted out.
Petunia Dursley - ISTJ
Vernon Dursley - ESTJ
Marjorie Dursley - ESTP
Dudley Dursley - ISTP
Seamus Finnegan - ISFJ
Rubeus Hagrid - ISFP
Igor Karkaroff - INTJ
Viktor Krum - ISTP
Mulciber - INFP- how so?
Peter Pettigrew - ISFJ
Poppy Pomfrey - ISFJ
Prof. Quirrell (sans possession) - ISFP
Augustus Rookwood - ENTP
Dolores Umbridge - ESTJ
Arthur Weasley - ENTP
Percy Weasley - ISTJ
Kennilworthy Whisp - INxP
Gryffindor : xSTJ- also bravery for values lends itself to both NF and STP often
Slytherin : xSTP - and NT. plans to change the world according to their beliefs much? and I;m sure you'd find your occasional snobby NF