I literally said the solution in my first comment? Multi-member districts. Each district has, say, five representatives and they’re elected using some sort of proportional representation. Sequential Proportional Approval Voting is probably the best for the US. You can read up on the specifics of that method if you want, but in general any proportional method tries to take into account the fact that once a candidate gets into office, the people who voted for that candidate now have representation and some amount of satisfaction, so other people’s opinions should be more heavily weighted when awarding the next seat. It’s easiest to explain with party-based methods, but essentially, if the vote totals are 40% Team A, 40% Team B, and 20% Team C, then the winners should approximate that vote breakdown. In this case, 2:2:1. What it means is that minority populations are much more likely to have someone in office who faithfully represents them, but majority populations are still going to have the appropriate fraction of the seats in power.