Ghave, Guru of Spores

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Hah, forgot about Army of the damned, that's a great one. The triple black cost can be tough with black as your least-of color, but with good mana fixing and/or ramp, it's not a problem at all and definitely a great card for the deck!

Breeding pit depends in the deck - 0/1s are of limited usefulness, even if you're making a billion of them. I'd rather have {Awakening Zone}, which gives you 0/1s that make mana instead of costing you 2 every turn. However, if your deck is loaded with {Overrun} effects, those 0/1 thrulls nights be worthwhile.

As for Endless Ranks, I wouldn't bother unless you have a consistent amount of zombies and zombie tokens. With a Ghave deck, you're likely only going to get zombies from Grave Titan and and Army of the Damned, which means Enless Ranks is a totally dead card unless have exactly one of those two other cards in play.

i was more trying to mention black token generators than ones specific for this deck, since you were trying to list some.