VA-MD-NC-GA, but it depends. Hate I had to move back to TX, but the public HS my kid went to in NoVA was a top-125 HS in the nation, and they had a good share of black kids who went to A&T, Howard, GW, G'town, or UPenn (for some reason). The curriculum was light-years ahead of the current ISD she's in here in Dallas. hence why I'm looking at getting her into Booker T. School for the Performing Arts.
MD will give you the diversity you're looking for. NoVA definitely doesn't, but my kid is a little code-switching prodigy and shyt, so she survived. I lived in Bama and would stress to only live in Huntsville. They have some EXCELLENT HS there like Tech Demo or Bob Jones in Madison.
My suggestion collegiate wise is look for a school that is big on academics but loves its athletics. My homegirl, who went to Villanova, swears the private, Ivy, and Ivy League adjacent schools in Philly are like this.