Roy was higher level than the rest of the Order when he died (c.f. Eugene calling him "the highest level Good character on the field")
I doubt that's a reliable enough information.
Ser Ilyn, Ser Meryn, Queen Cersei, King Joffrey, The Tickler, The Hound, Ser Amory, Polliver, Raff the Sweetling, Weese, Dunsen, Nale, Ser Gregor Clegane and Chiswyck: Winter is coming!