Sean Bean's best ever screen death (and we all know that's saying something) is also the most gut-wrenching one in any of the six Middle-earth movies. Unlike Gandalf, you know Boromir is gone for good, and his death is given extra weight and pathos by the scenes that precede it: his attack on Frodo makes it clear how weak and corrupted he's become, but he dies in a redemptive bid to save Merry and Pippin, and uses his dying breath to declare Aragorn "my brother, my captain, my king".