EVERYTHING by Lindsey Stirling (esp. Crystallize) or Hozier, Miss You by Trentemoller, Conquest of Spaces by Woodkid, Dark Doo Wop by MS MR, "Find Yourself" by John O'Callaghan, Hey Brother by Avicii, Circles by KDrew, Undone by FFH, "Afterlife" by Switchfoot, "Papaoutai" by Stromae (esp. the Pentatonix cover of it), "The Cave" by Mumford and Sons
I don't have many other songs xD But I hope you enjoy these ones.