Nas - Queens Get The Money
If you do your research on drumless rap tracks, this is one of the most mentioned tracks. It's for good reason, because Nas spits some incredible bars over a looped piano bit. It's an intimate affair as the king reclaims his throne.
Nas said, "I'm over they heads, like a bulimic on a see-saw," on this one, and he's right. You could listen to this 20 times and still get something new out of it.