Alright, let me ramble a bit about 'The Strongest Dull Prince's Secret Battle'. I binged the web novel a few months back, so spoilers ahead, obviously. A lot of throne battle stories end with the prince just winning outright, but I like how this one handled it.
The core twist is that the 'dull' prince, Erhardt, never actually wanted the throne for himself. His entire secret battle was a meticulous, years-long operation to dismantle the corrupt aristocracy propping up his siblings' claims and to expose the external conspiracy manipulating the crown from the shadows. The final arc isn't a big coronation; it's a series of revelations in the royal court where he lays out all the evidence, showing how his 'scheming' brothers and sisters were actually pawns.
He ends up forcing a constitutional reform, establishing a council to limit the monarch's power, and then, in the biggest surprise, declines the crown entirely. He nominates his most ethically sound younger sister, who he'd been secretly mentoring, to rule under the new system. His own ending sees him 'exiled' to the frontier—which was his plan all along—to run the R&D and intelligence division he built, free from court politics. It's a victory, but a quiet, personal one, not a traditional conquest. The last chapter is just him tinkering in his workshop, finally at peace, which felt perfectly in character.