To me, a rappers ability rests on a listener's quotes. If he ain't got nothing for you to quote obviously he aint saying nothing important. I listen to almost all punchline dudes and my top 3 goes like this...

1.) Crooked I
2.) Joell Ortiz
3.) Nino Bless

How yalls look?

top 3 right now
Sly Boogy
Crooked I
Phonte

all time
Big L
Redman
Chino XL