Captain Sonar! It’s a 4v4 game reminiscent of battleship but you can move around and it’s played in real time. You can make moves as often as you want but do so by announcing them. The opposing team has a person whose sole job is to listen and use your revealed moves to deduce your location. Hectic as all hell.
Other than that Twilight Struggle for 1:1. Hopeful that ISS Vanguard will prove to be amazing.
I find it works fine with 6 and 4. You just need to modify the rules so that the captain can’t rapidly make moves on their own. Needing a second person to affirm their decision is critical. Otherwise they’ll inevitably focus on one task too much.
Other than that Twilight Struggle for 1:1. Hopeful that ISS Vanguard will prove to be amazing.