You can say that for the last ten years and both Emperors that were having decade-long build-up.
Mihawk, on the other hand, is the backing power of perhaps the most important organization in the OP world.
After all, Buggy is the only clown that can beat Luffy in clownery. :goyea:
He gave both WSS and WSM to Ryuma as well.
Then, as you already know, is wielded by current strongest swordsman in the world.
And will be wielded by the future strongest character in the OP world.
These WSS fraudsters ruling the world. :goyea:
So far, Oda have given WSS titles only to those who were strong enough to achieve a Black Blade.
Unless he retcons it, Rocks doesnt have a Kokuto and probably wont get the WSS title either.
However, in every era, at every point, someone was Strongest Swordsman in the World and Xebec may have...