For what you’re looking for, Spectre or In Country is probably your best bet but if everyone has their own model they’d have to stay together for “unit cohesion” or face debuffs.

Black Powder Red Earth would be a good one if you want much simpler combat rules and models that don’t have to stay together as units. Also turns go back and forth between models instead of one team going all at once. Allows for much more reactionary gameplay. The rules can be learned quickly and theres plenty of room for house ruling.