Harry potter halloween costume?

i want to be harry potter. i dont want to buy one from a store cause these just seem so generic and i think it would look a lot better. but anyways i was thinking i could get a cloak of some kind and wear like a gray sweater and the gryffindor scarf (its so cold already so i wanna be warm haha) with the gles and scar. orrrr maybe a gray v neck sweater with the colored shirt and the gryffindor tie. but i dont know if these things would actually look good. if you have any suggestions on how to improve the ideas i had or a completely different suggestion, id appreciate ittt :D also if you had any pictures of someone with a unique harry potter costume.thaaankss!