I'm not much of a pixel artist, but I took a crack at modifying some of the existing weapons to work with the idea of long/greatswords and titles of nobility.
Here they are, alongside a GMK lance for comparison.
They're the same size as the GMK lance, and are based on the Sgt. at Arms and Weaponsmith (Eogan) weapons. I sized up the existing weapons to be longer and thicker, and then added a flag wrapped around the tip for each, to keep with the existing forum theme. I think these could fit well with Orion's Baronet, Baron, Viscount, Count idea. As for Marquis and Duke, I have no idea what to do. If someone has a suggestion, I'd be happy to give it a try, although I'm considerably worse at creating things from scratch than I am at editing things that have already been made.