Who Is the Ruined King?

Hey guys! This is my first time posting on the league forums. Recently, I developed a theory after reading a bit into the lore of Yorick (Happy birthday to my man- 6 years with no skin!). Now I sent a support ticket to riot actually asking around about some of the lore, and got some responses, so I'll iterate more on those after I get the main theory out of the way. Here it goes: Who is the Ruined King?

So, knowing the history of Yorick, along with the history gathered from Hecarim and Kalista, it seems like the ruined king abandoned his nation for a good while to get to the Blessed Isles. It was extremely difficult for Kalista, and if we look at how long ago this was, it seems like the ruined king shouldn't be alive now, but the fact that the curse still lives shows that he exists. And here, the larger, more out there conclusions start to surface. Here is the major jump: King Jarvan Lightshield IV, Exemplar of Demacia, is actually the Ruined King. Now the first thing that should come to mind is, If this was so long ago that people forgot the nations name, then how could Jarvan be alive? And where is the evidence he could live that long? It starts with one of Yoricks quotes when attacking dragon: "Your kind is supposed to live long. I am sorry." Of course, we then link this to Shyvana's lore, where her father, a terrifying dragon, was slain by him. Of course, that could have been recent- but it seems more likely that this happened during Jarvan's absence of Demacia, which coincides with the absence of the Ruined King. Shyvana, having dragon ancestry (Shown wonderfully in her kit), could very well have lived long enough to be with Jarvan during his travels. And, at that, the events took place long ago to the point where Hecarim and Thresh forgot their origin, meaning most people couldn't live long enough to recall Jarvan. For if his empire fell, surely his name would have been forgotten as well- until it surged in the new nation of Demacia.

That being the original theory, I am glad I sent in the support ticket, because a gentleman named Riot Gunny was wiling to point out some. Hopefully, we can iron them out in this thread. From there, we could either solidify the account that maybe Jarvan is the Ruined king, or, more likely, form a new identity for the King. Now, onto the support ticket.

The first thing Gunny pointed out was an excerpt from The Princelings Lament (stanza 10, lines 5 and 6), as follows:

"Cursed to undeath by this grief-maddened king. He begged it all end with his very last breath."

Gunny mentioned that the line "He begged it all end with his very last breath" contradicts Jarvan being the king, because it implies the Ruined King did indeed die. Note, he also stated that while he thinks it is likely that this poem was referencing the Ruined King, he wasn't its writer, and is unsure. Next:

"As he searched, Yorick slowly pieced together the events that led to the cataclysm: A king had arrived seeking to resurrect his queen, but instead, had doomed the Isles and everything on them. Yorick wished to find this “Ruined King” and undo the curse he had unleashed. But he felt powerless in the face of the seemingly endless death that surrounded him."

This excerpt names the Ruined King as a man who brought doom to the isles. The Princeling's Lament also tells a tale earlier in the poem of a king who "damned the world to endless strife"

"The monk told tales of a time forgotten An ancient queen, now dead and mulch-rotten. Of her king brought low by sorrow and woe, Who came to this isle to bring back her life, But damned the world to endless strife, Spirits of death and carrion crow."

As Gunny said as the recap:

• It's likely that the king in the Princeling's Lament is the Ruined King, based on the similarities between that king and the Ruined King referenced in Yorick's biography.
• Because of this, it's likely that the Ruined King is dead, since the king in the Princeling's Lament died full of regret after failing to resurrect his queen.
• This means that for Jarvan IV to be the Ruined King, he would have to be a resurrected abomination. Without further evidence, it would be hard to believe that somebody as clean looking and good as J4 could be the Ruined King, regardless of his absence.

So, with the theory and its counters are out of the way, I would like to get the ball rolling with a few questions. Do you think we have the ruined king in the League already, or is the only thing left of the lost man his blade? Where are some more resources for who the king might be? Who might the Princelings Lament be referring to in the league already?

Big thanks to you all for taking the time to read through my post and its corresponding reply from riot. Hopefully, we can pull some meaningful speculation out here!