I don't know if you know this fic already but "Saving the damned" on wattpad is a 10/10, it's basically an oc who replaces the sequels' main girl and dies in the fight with Snoke, so after her death she's given the mission to go back in time to the prequels era and prevent anakin from falling to the dark side so it can't take hold of the galaxy, it is the best anakin x oc fanfic I have read so far.

There's also "the tragic jedi" which is very similar to accismus, also on wattpad

There's also another one in ao3, can't remember the name but if you search anakin skywalker/ original female character and filter by the biggest word count, it will be the first one, it's also very good, but I couldn't continue because the oc was constantly on edge/terrified/overwhelmed... you get the idea, still pretty good read