I was on a longer than a decade hiatus in war gaming (mostly due to kids) after years of painting/playing 40K, Mordheim and some WH fantasy. I asked some of my old crew for a recommendation for a small scale skirmish game with accessible rules to get my boys interested. I got lots of lukewarm recommendations for Kill Team (“it’s cool, but the line of sight rules are unnecessarily complicated” etc), but one friend suggested Frostgrave (competitive) and Rangers of Shadow Deep (cooperative). I did some research and got the RoSD book, and I’m blown away. These games are miniature agnostic, and the rules are streamlined, but in my opinion, this has been done very skilfully, so the game remains deeply tactical (if you wish to make it so). It’s fantasy themed, so it probably wouldn’t appeal to those looking for a strictly historical game. The same author (one Joseph A. McCullough) also released a SciFi themed game using the same system called Stargrave.