Acolyte hit them all perfectly. Color of the horses is a dead-giveaway. Famine isn't a song on Nostra but is the third horseman. "Death" is #4 (always has his scythe and rides a pale horse); War has the battlaxe and rides a red horse, FAMINE isn't represented by a song but holds a balance as food was rationed; plus he rides the black horse and the typical iconography is plague on the white horse shooting down victims with an arrow. THAT is the only contested one as the white horse also symbolizes Conquest. Either way, he is covered by a Nostra title.
Famine was the answer. Acolyte nailed it obviously ignoring the "4 Horsemen" by Metallica. "Time" didn't play into the picture at all.
