Fingolfin's death was truly heroic, as was Fingon's. But I must add to this list of interesting deaths another elf, Maedhros. After finally reclaiming a Silmaril, he took it in his hand and it burned him, showing that he was impure of heart. In anguish he cast himself into a fiery chasm.
Poor Maedros!
All that work and only to end in suicide... perhaps a little group therapy could have helped a bit...