here's another way to judge a player's legendary status, since as discussed by others playing ability is only part of the tale.
my mother has lived in cuse for about 50 years. she cares nothing for pop culture or sports so if she knows them, they have a good degree of "legend status."
to give some perspective, way back when Coach Mac was fresh on the campus (under 3 months into his tenure and there had been a ton of local media surrounding his arrival) my mother and he were seated next to each other at a luncheon. my mother, ever the polite conversationalist, asked him what he did for a living at which point Coach said "I see we'll have nothing to talk about" and turned his back to her. To this day, whenever they see each other, Coach comes over and introduces himself as Jim Boeheim
Point is my mother knows who GMac is. thus - Legendary Cuse Player. She would also know DC1, Rony, Carmelo and a few scattered others. Warrick would be a no.