I voted swordmage for the simple fact that it is the most generic of the terminology. Bladesinger, Duskblade, and Hexblade are all specific applications (or builds, or themes or whatever floats your boat) of a guy with a sword that uses magic. I'd even go so far as to look for a different name for the class, so it doesn't appear limited to swords. I see no reason why a goliath with a hammer tossing around close burst earthquakes, conjuring icy terrain around himself, and using magic to bolster his strength or endurance, couldn't be the same archetype, mixing weapon and magic, though hammermage doesn't quite have the same ring.
I think the flavor of such a build can be better captured with a class built from scratch using its features and spells/powers as design tools, rather than trying to create it from a multiclass/hybrid concept.