I've not had much to do with black American people (living where I do), other than seeing sailors when the fleet comes to port, and watching rap videos and video award ceremonies. I'm hardly an expert on American subcultural divisions.
But I have to say the only black character I've read in comics which came across as genuine was Amanda Waller in Suicide Squad. Even Black Panther, written by Christopher Priest (who I understand is a black guy) wasn't really a comic about a black guy - T'challa is a pompous king of an imaginary country.
Of the other characters, Black Lightning, Bronze Tiger, Vixen, War Machine, and John Stewart seemed just as superficial as most characters as superhero comics, regardless of any reliance by the writer upon a subculture to lend personality. Ambrose Chase is the other one who springs to mind, who was around for half an issue before getting shot dead ("The black guy always dies in science fiction movies," as his killer said.)
