If Harry, Ron and Hermione were sorted into Slytherin

What if:
Harry was sorted into Slytherin but what if it wasn't just Harry what if it was Ron and Hermione that were sorted along with him? What if they didn't need the help of Dumbledore when defeating Voldemort? What if it wasn't a bunch of teenagers that defeated Voldemort? What if it was just the golden trio? All this is answered starting with the philosophers stone and all the way up to the deathly hallows. Seven books are to come but first lets just start with the philosophers stone.