I've always looked at in 4 categories. Played for Rangers.
1.Run of mill guys that can say they played for us. Alex Rae, Gavin Rae,Steven Thompson , Halliday, Dave Mcpherson and the like list is endless.
2 Cult heroes likes of , Novo, Ted McCmin, Marvin Andrews , Graham Roberts etc etc.
3. Rangers Greats. This is where Morelos is imo. Likes of Ian Durrant (only that injury stopped legendary status) Neil McCann, Amoruso, Davie Weir etc etc.
4. Legends. Overused to me this is should really only be used for the truly great. Greig, Gough, Ally (obviously) DJ, Hateley, Baxter, Laudrup etc. Best will in the World Morelos isn't in that conversation for that list of players.