For me:

The Roots (perferably Black Thought)
Mos Def
Canibus
Jean Grae
Talib Kweli

Yea, I made it a routine to listen to them every morning and every evening when i'm writting. Its helped me improve on various aspects, and to me, Jean is one of the best female mcs out there. But yea, those are my influence. If i could add another, it would be common, those guys are too soulful and represent true hip hop. So what about everyone else?

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Grim