The question needs a little refinement. The City of Detroit is 80+% A/A but it is only 15% of "the D", Metro Detroit-Windsor. So who are we characterizing? Even then what are the metrics? Singles/albums/ sold and radio plays? <- now antiquated terms in the age of streaming, but you get my point.

My understanding is that Eminem sold more than anybody in the US, maybe the world, from 2000-2010. Madonna, if she counts, did well too. The grand old names like the Motown Legends, Seger et. al. just collected some royalties, and did nostalgia tours.

I think art in general is in an "end of style" age where nothing dominates but all styles run side by side with an occasional superstar emerging on one genre or another.