So I've had time to start working on it again today and if I remove the loops, The sword becomes very flat and I kind of liked the subtle shape it gave it with the loops. Is there any other way of fixing the hole that you can think of because I still get those weird shading artifacts. Ill post more later.
Those two edge loops in red do nothing for the shape (Waste of vertices), and should be removed (Unless the large faces of the blade aren't planar, for example if it tapers in at the back. It's hard to tell from that screenshot).