For the most part, Dekalb and Fulton County public schools have completely fallen off the map in football. Cedar Grove is the exception. Metro Atlanta is being dominated by Gwinnett County (Grayson) and you have some good private schools that give scholarships like Pace Academy where we got Realus George. South Georgia remains strong as ever especially in Lowndes County
My kids school was 3A and in the same region as Cedar Grove and Pace Academy. The public schools in the region like Redan and Stone Mountain were TERRIBLE. I mean terrible as in they don’t attempt extra points because they don’t have a place kicker and a competent snapper. On punts the punter is only about 8 years back because the long snapper can’t get the ball 13 yards resulting in lots of blocked punts. And typically the public schools in Atlanta only have about 25-35 kids on the entire team. There is just no money in those programs. None of the schools you named; Doug, Banneker, Tri Cities, SW Dekalb, are doing much in football.
Basketball is a different story because you only need 12 kids and 1-2 superior players can take over a high school game.