The best recommendation so far out of all of the ones posted in this thread was Gia Lashay -
Gallery here.
Admittedly I'm biased because she's practically a twin of my wife, except for her lighter skin color.
Here is some constructive criticism, although each of these women have settled into their own niches and are doing pretty well accordingly:
Kiss Promise - too childlike
AhShanae - ghettoish aura
Joi Ryda - that ass is too fat (that's a compliment, actually)
Summer Banks - Has potential body and color wise, but needs a better weave and also to get rid of the fake contacts
The problem with the black niche is that the people pushing it tend to mistake slutty for sexy. Quite frankly I'm not sure that the black niche has fully defined itself as yet.