I have, over the past few months, discovered the usefulness of magnets for sword hanging. Some of the swords I have are in their sheathes, and so I can use a large tool-hanging magnet from the hardware store. But for a few, I either have no sheath, or the sheaths are lame, so I'm hanging them with naked blades.
Now I used to have one sword hanging up on the wall by itself, but I got a companion blade for it, and so I needed to move it over. It took a few tries, and some patching and re-painting, but the swords are hung as you can see below.
I'm very happy with the look.