These were gonna be my potential entries:
Also I strongly recommend this version of Endless Love, its even more astoundingly beautiful, emotional and powerful!:
I would have LOVED to submit either of these, tormenting myself on which one to go with it too, but netiher where used as OSTs for anything AFAIK, as they are covers of well known songs but the I See Fire one is a cover of the Ed Sheeran song from The Hobbit movies or so ofc?: