Nas is Mt. Rushmore status but he only has one calssic.
One thing I would say to this statement, you really can't tell what is going to become a classic.
Let's look to the case of one of my favorite artists,Miles Davis. Miles was regarded as a golden child of Jazz music but when he went electric, he was blasted 10x more than Kendrick ever was. He was a heretic, a sell out,a disgrace to jazz, any insult you can think of. The writers made sure the people were to know "This is a terrible album that no one should listen to" People hated the fact that Miles didn't want to do the sounds they were accustomed to. Because he went electric (Similar to how Bob Dylan went electric at Newport Folk Festival and he was crucified as a traitor to electric) But really it wasn't a betrayal, it was a revolutionary moment that needed to happen for others to have a career & place in music.
Today, bytches Brew is not seen as horrendous,sell out,blasphemy. Miles Electric Period is celebrated more with each passing day. This is how we really have no clue (not you, not me, not anyone) what is going to become classic. That is just one example of what happens over time. Some people are just so visionary, they understand the fact that something won't be revered now but they have to create it because the zeitgeist wills it exist. Who knows what Nas albums will be revered other than ILLmatic? Get back to me in 200 years...