Harry Potter and the Grim Reprieve

Harry Potter is greeted by death and given a chance to save a world where he is set to die at seven. Waking up with the knowledge of his older self, Harry tries to manipulate events but ends up facing a world without the Weasleys. Without the family that had made his older self who he was, Harry must continue on and do all he can in a world that isn't exactly as he expects.