This is a fine composition. It is both part of the ROmantic and pre-Raphaelite in its composition, and yet it also negates those artists' devotion to triumph and defiance. This is the the time of the Unnumbered Tears, there will be no victory, or even bold defiance in the face of the enemy. There is only death and despair, with no hope of escape or a new chance. Fingon knows he is facing this, and yet he stands at bay, both because submisison is unthinkable, and tha wasting Gothmog's time slaying him gives the host of Gondolin more time to reach the hidden road to safety. So maybe it's not so dissonant with the older masters after all.