In a original one, not fan fiction. Is Wikipedia sufficient?
Are you talking about like Historical Fiction? That sort of thing?
Yes.
Ok, this makes much more sense to me now. I love historical fiction! Would you be willing to share any of what you have in mind?
Historical figures, too many to specify
I would first decide like what kind of genre and type of personality you’re looking for. Then I’d Google “famous…. &&&s from history” like inventors, or military leaders, or doctors, etc. to find available choices. You could also search for “notorious” for people who aren’t totally good, or “unsung / uncredited” for people who did great achievement but never got credit or fame. You get the idea. Narrow down what you’d like first, because otherwise there’s seriously too much to choose from.