Essentially every city that has a black population has middle and upper class blacks, lol, not just Memphis - you can find them in literally any metropolitan area in America; this is not the result of 'monolithic' racial populations and demographics, it's the result of mathematical variability; yet again, if I toss one million completely individual factors into one place, it is a guarantee that at least one of those individual factors will differ from the rest.
Blacks are not all locked in the ghetto or poverty in metropolitan areas throughout the country, lol, that's just a majority sample, there are individual blacks doing well for themselves in every part of the country. If that's 'good enough' for you, then basically every city in America is 'good enough' for you.