Need help for a certain kind of good HP fanfiction (very specific).
I'm searching for a long, good, male OC fanfiction happening in parallel to the books and following Harry and his friends in their adventure while having his own plot. I would prefer a fanfic where the OC isn't OP from the start, there aren't any great changes in the og plot (e.g. Harry is in Slytherin instead of Gryffindor, Ron gets gender-swapped...) and the OC stays close to the golden trio (to start, it'll be good if he was a Gryffindor).
I know it's very specific, but I haven't found anything even remotely close to that.