I dont see a problem with him standing with Melvin and I think you might be overrating his striking a little bit, its good but he's not a premier striker IMO.
I think Dunham will beat him standing or on the ground. Dunham still needs some work but I feel he's already better than Guillard.
"I fear no man, but Jim Harrison and Mike Stone are the two last men that I would wish to meet in an alley fight. Jim Harrison's fighting style is not flamboyant or spectacular, it's just simple and deadly!" - Bruce Lee sakurabushidokan.homestead.com