The Founder's descendants

What if Harry was the descendant of Godric Gryffindor and Helga Hufflepuff? What if Sirius had a daugther descended from the other two? In a twist of fate the founders live on. This story includes: Manipulative Dumbledore Ancient line of Potter and Good Draco, because why not? I don't own Harry Potter Miss Rowling does however, all props to her for such a good series.