It never ceases to astound me how much Harry Potter fanfiction there is in this world. Former Harry Potter fanfiction authors are now New York Times Bestsellers, whether you like it or not. An entire generation's passion for creative writing began with Drarry and Dramione stories featuring plots I couldn't speak of in a public setting. I wouldn't be surprised if Harry Potter is the most written-about fandom in the entire history of fanfiction.
I did not particularly obsess over Potter fanfiction when I read the books, but there was one story I could not look away from; All The Young Dudes. Widely regarded in the Harry Potter fandom as one of the best HP fanfictions, All The Young Dudes follows Remus Lupin from his pre-Hogwarts days up until the events of Harry Potter and the Order of the Pheonix. If you are a fanfiction hater, I would recommend this over whatever is happening on Wattpad.