in no order...

BIG L
eminem
jay z
nas
can-i-bus (one of tha greates battle rappers+freestylers and most unerrated eva)
BIGGIE (of course)
Tupac
Wu Tang
slick rick (im kiddin)
luda ( he's really creatice along wit 4-IZE)
common(these last 2 are really not tha best to me but i couldnt think of nobody better)
kanye(same)