This one straight after Update 16 as I'm not posting daily anymore.
Nas, always hits it off nicely!
AZ, way less known but a similair flow to Nas', they featured each other alot on their debut albums
For example AZ on Nas' Illmatic:
and Nas on AZ's album called Doe or Die
And more tracks from AZ
AZ - Raw Uncut (My favorite, crazy rhymeschemes and awesome beat)