My dear detractors, I think I have in fact nailed the spirit of this game on the head with how I have chosen to Role-play Valgaard, and I shall explain why if you will but give me the time and the space to type it;
The Celestial Empire has fallen and all it's former territories have fractured into smaller kingdoms ruled by the former lords of the grand Empire.
I think this point alone can help shed some light on his I have set up Valgaard. This opening post stats "Fractured into smaller Kingdoms", of which Valgaard is one correct? Who but the people of that region decides, ultimately, what title they would bestow upon that "King". If they call him a "High King", it is no different, for he is High King of Valgaard, a land which was created in the spirit of this very opening statement in the RP's descriptor.
But the king of Gnyr Shalorn isn't the only king that claims the now defunct throne of the empire, the other kings now desire to rule a vast empire as well, however, this desire to conquer has now set the stage for a war between kingdoms and the victor will yet again rule the vast reaches of the world...
Here again we see the blunt statement that more than one King, Valgaard can easily have its own King and fit nicely into how you saw this world working out, very much like Feudal Ireland, famous for its many Kings and at one time it even had over 600 Kings! Occasionally they were united by a single man calling himself "High King".
If you're still not convinced than allow me to explain a little more in detail how Valgaard operates and why it is listed as having other major houses, which I think is the only thing you read before laughing and self importantly going "This guy has no idea." I assure you, I am well aware of how Feudal Kingdoms worked and that Valgaard is perfect for your RP.
Valgaard is an independent Kingdom, formerly ruled by the Celestial Empire as I think we can all agree. Following the collapse of the Celestial Empire, Valgaard simply returned to its traditional ways, its people bound together by cultural ties, language and regional economics. No different than say, Ireland, when it broke away from the United Kingdom. Valgaard, as I shall RP it, has always been an army with a nation and when it was included into the Celestial Empire it was only thanks to negotiation rather than force of arms. Now that the Celestial Empire has collapsed, the Valgaard nobles feel no ties to the Throne but still maintain their allegiance to the ancestral heritage of their homeland, the figurehead of whom is known as the High King.
This means the three main houses, with their smaller sworn houses, all agreeing on a High King, who at this moment happens to be Utgaardson. As the noble families of these houses are well known to inter-marry, it is possible he carries the blood of all three houses which is why he was seen as a logical choice for High King. His people need a uniting factor in the unstable and terrifying times after all.
Yes, I am aware that smaller houses might rebel if they think they can do a better job. That very reason is why Ireland or the Danes never conquered the world, they were to busy fighting amongst themselves.
Additionally, the idea of smaller Lords trying to unseat a more powerful King is an idea far older than "Feudal" times, I would submit the Danish invasion of England in the 800's. The Islamic Invasion of Spain in the 700's. Both are times when an organized enemy took advantage of disorganized and fractured people to conquer a vast swath of territory, and in the case of islamic Spain, build an empire that took Christian Spain 800 years to reconquer.
So, I submit to you once again the same nation sheet based on the reasons above since I think it fits perfectly into a "Feudal Kingdom" idea and the promise that intend to provide excellent RP and storyline to your role-play idea.