Chino XL is without question the best lyricist on earth.
Tupac definitely has that thug passion and spirit, but Chino XL did a freestyle that put "Hit Em Up" to shame. Or as Chino put it: "Pac died and I cried but I'ma represent it, when it comes to dissin my shit, make Makaveli sound like the Macarena..." He has much tighter lyrics than that though... check out
http://www.angelfire.com/mo/realHiphop/Chinoxl.html for more information.
"What the fuck you niggas think?
I roll with killers that spent more time in the pen than ink
Don't even blink, and turn your voice down a decibel
or start lookin for studios that's wheelchair-accessible
leave you a vegetable, trust I have the letters on your FUBU sweater standin for 'Fucked Up By Us'
"Without the HIV I'm positive, you don't wanna test
I leave rappers confused like homeless cats on house arrest"
"360 degrees of unadulterated battle rhyme
you must be inebriated wanting to challenge mine
My diss is so accurate you need time lapse cameras to capture it
tearing apart time's fabric, no exaggerate
35'000 giga harddrives only can store half of it
that ain't the half of it, I spit the blood of Christ on a Catholic..."