Anyone off of the Definitive Jux Label is Ill:
Aesop Rock
El-P
Vast Aire
Mr. Lif
Jean Grae
Murs
Atoms Family

Here are a few others:

Atmosphere
Optimus Rhyme
JMT : Jedi Mind Tricks
Josh Martinez
Percee P

Aesop
Lif
Virtuoso
Jedi "Vinnie"
Esoteric is ok (gay voice)
Cannibal OX (good delivery)
Apathy n Celph
Supernat

Who said Boston didn't have good emcees? Cough Virtuoso, Mr. Lif, Esoteric, Porn Theatre Ushers.. Don't sleep on the Bean!

Word..to Josh Martinez :)

Sage Francis
Atmosphere
Saukrates
Akrobatik
Planet Asia
Saigon

canibus
brother ali

blue print, j live, c ray walz, swollen members, journalist, chali 2na, double helix, sage francis, A team, phaze 1....

Canibus+vakill

Some under ground rappers are

VA Slim-hes a punch line king
AC3-hes a punch like king
Lil Brotha
Fast
Will Vill-hes underground but his albums dropping dis year( devils in a blue dress)
Andy
DG
Fly

canibus
saigon
mega
tradgedy
graph
bad seed
last emp

none are good yet

Copywrite
Jedi Mind Tricks(Vinnie Paz)
Jus Allah
Outerspace
Cage
ill bill
necro
mr. hyde
goretex

Killa Capone
Yng Gage
Mecca loc
Lil D
Unknown
Quick-to-Macc
Darkskin
these are all westcoast underground artist. :spit: :spit: :spit:

Immortal technique,Aasim Da Explicit(cop his singles),Canibus, and Jean Grae.There is more.

here ya go
canibus(one of the best freesyleistics)
jmt both of them cool
hyrogliphics
sage francis
krs-1
tuna fish(jurrasic 5 crew) they all good