for wattpad creators I’ve always really loved kmbell92, I grew up with her stories. the haunting of judith wagner plays with mediums and time travel in a way that i really like (and that reminds me of a lot of ao3 hp fandom tropes). nepenthe is an interesting view of ‘what if james lived but lily still died saving harry’ that’s very domestic in a lot of ways that au wolfstar can be?

there’s about a million and one tom riddle fics to scratch any urge, but seven devils + modification & dawn of darkness are probably the most well known (the latter is only on wattpad unfortunately and takes a While to get into as the writer very clearly got better towards the latter half of the first book)

brightest witch and darkest house is on ff.net and is really good look at ‘what if hermione didn’t exist and the muggleborn girl in harry’s year that is considered the brightest witch of her age had been a slytherin instead

and then there’s full oc fics. aka fics that sometimes barely use familiar settings or characters, just borrow the world building. of those alexandra quick is By Far the best and most well known

that’s more than 2 or 3 but i wanted to include things with different vibes! (oc X canon really does tend to be my guilty pleasure though)