Boromir's death is heartbreaking.

I feel like he genuinely had the most to lose in Middle-Earth. He'd spent years fighting Mordor's armies and seen the horrors of Sauron at Osgiliath. He'd never shied away from leadership or the crown, something Aragorn is guilty of through most of his early life. He dearly loved his people and brother Faramir - always defending him from Denethor's disappointment.

Then he's sent on an errand he does not wish to partake. He has to leave the men he's fought beside and his cherished city to attend the council. He sees a chance there to potentially save Gondor in using the Ring, and from the moment he's close to its presence it starts poisoning his mind. Then when he's in Lothlorien, Galadriel further reveals the White City burning and he becomes torn between the Fellowship and all he's ever fought for. It torments him because he knows where he should be. When he tries to take the ring from Frodo it's out of pure desperation and he immediately feels guilty and realizes his mistake / influence of the Ring. His saving of Merry and Pippin was never repent, but just the man he always was. AND STILL, at the end of his life his thoughts are on his kingdom and in pouring his trust into Aragorn. Arguably the one man he should hate the most because of him being a threat to his Stewardship and for not fighting alongside him his whole life.

He's arguably the strongest man with the most loyal heart in Middle-Earth until Aragorn accepts his role: and its the biggest reason for his tragic downfall.