Its impossible to say which is the greatest but here is a few i think are under rated.
Jay-Z - diamonds are forever
I'ma victim of a single parent household, born in a mousehole
Mousetrap,
z wanna know
How so, how Jay get up out that, here, yeah
I snatched purses I per-se-vered
Jay-z - ignorant shit
They're all actors
Looking at themselves in the mirror backwards
Can't even face themselves, don't fear no rappers
They're all weirdos, DeNiro's in Practice
So don't believe everything your earlobe captures
Its mostly backwards
Unless it happens to be as accurate as me
And everything said in song you happen to see
Then actually, believe half of what you see
None of what you hear even if its spat by me
And with that said, I will kill
z dead
Cut
z short, give you wheels for legs
Im a K-I- double -L-E-R
See ya'll in hell
Shoot
z straight through the E.R.
Whoa