When you ask Hip-Hop fans to name their Top 10 MCs, there are certain names cited consistently–Nas, Tupac, Eminem, Biggie, Jay Z…but, inevitably, there will be artists mentioned that seem like wildcards, too. However, when you pay close attention, you’ll find that these artists’ names also recur. These are MCs like Black Thought, Talib Kweli, Posdnuos, Rah Digga, MF DOOM…These are the favorite MCs of favorite MCs. Yet, in GOAT discussions, their names are often lost.

Part 4 of our Finding The GOAT documentary honors those MCs who have earned the respect of critics, peers and fans, alike, but for whom widespread commercial success may have been elusive, or at least not commensurate with the level at which they are revered. The spotlight may not have shone as brightly on them, but, when it comes to MC’ing, there are no brighter stars.

Related: Why Are Women Excluded From the Conversation About Hip-Hop’s Greatest MCs? (Video)