Ghost. Pound for pound epitomizes what an MC is supposed to be almost more than any outside of a select few.
One of the greatest discographies ever
Top notch lyricist
Created his own style that many can copy but none can duplicate
Has made lyrycally lyrical, street, underground, club, girl, introspective, storytelling AND nonsensical songs and been great at all of it. Consistently
Has had both mainstream and underground success
Deserves to be in anyone's top 10 GOAT list, no less than top 15 if you discount regional/age bias.