Hard to go wrong with Baduk/Go. Doesn't really scale to groups though.
Terra Mystica[0] and Tzolk'in[1] are both low randomness worker placement game that require long term planning and fun mechanics.
If war-games are more your speed, Diplomacy[2] and Twilight Imperium 3rd Ed[3] are some of the best in class. Both take all day (or more if you play Diplomacy by mail). I personally like Exocus: Proxima Centauri[4] a lot in this genre.
Baduk/Go doesn't scale well in groups but it also can impart a lot of important life lessons as you learn it.
The enemy's key point is yours
Beware of going back to patch up
Don't chase what you can't kill
Check escape routes first
Big dragons never die
Give your opponent what they want
Don't follow proverbs blindly
Diplomacy is wonderful. I find it hard to get 7 people to commit to 4+ hours to make it through a game, so the mail option is good, but IMO in person is more fun.
Terra Mystica[0] and Tzolk'in[1] are both low randomness worker placement game that require long term planning and fun mechanics.
If war-games are more your speed, Diplomacy[2] and Twilight Imperium 3rd Ed[3] are some of the best in class. Both take all day (or more if you play Diplomacy by mail). I personally like Exocus: Proxima Centauri[4] a lot in this genre.
[0] https://boardgamegeek.com/boardgame/120677/terra-mystica
[1] https://boardgamegeek.com/boardgame/126163/tzolk-mayan-calen...
[2] https://boardgamegeek.com/boardgame/483/diplomacy
[3] https://boardgamegeek.com/boardgame/12493/twilight-imperium-...
[4] https://boardgamegeek.com/boardgame/122842/exodus-proxima-ce...