some excellent recs in this thread already so im just gonna throw out some of my favs that haven't been mentioned yet, from a fairly wide range of styles
the doppelgangaz- lone sharks, hark
billy woods- history will absolve me, dour candy
viktor vaughn- vaudeville villain (my fav mf doom release not mentioned thus far)
cannibal ox- the cold vein
dj shadow- endtroducing
edan- beauty and the beat
elzhi- elmatic (also the preface and lead poison, they're more uneven but have some dope songs)
black moon- enta da stage
smif n wessun- dah shinin
eric b and rakim- paid in full, follow the leader
big daddy kane- long live the kane
masta ace- disposable arts, a long hot summer
cunninlynguists- a piece of strange
melanin 9- magna carta
mick jenkins- the waters
denzel curry- imperial
boogie down productions- criminal minded
nwa- straight outta compton
scarface- the diary
public enemy- it takes a nation of millions to hold us back
the coup- genocide and juice
organized konfusion- stress: the extinction agenda
jay-z- reasonable doubt, the blueprint
pete rock and cl smooth- mecca and the soul brother
jeru the damaja- the sun rises in the east
common- like water for chocolate, be
goodie mob- soul food
ugly heroes- ugly heroes
blackalicious- blazing arrow
company flow- funcrusher plus
freddie gibbs- pinata
j-live- the best part
killer mike- r.a.p. music (my favorite 'run the jewels' album tbh)
slick rick- the great adventures of slick rick
souls of mischief- '93 til infinity
the d.o.c.- no one can do it better
prhyme- prhyme
blu and exile- below the heavens
dr octagon- dr octagonecologyst
big pun- capital punishment
juggaknots- clear blue skies
that should last you for a little while heh