Dwarf Fortress, I'd recommend it but only to someone I know had some interest, especially if they want to play the ascii version. Cataclysm Dark Days Ahead would be another. They're pretty hardcore, Aurora 4x and Dominions would also be hard to get people into unless they had some interest
I think Dwarf Fortress's Steam release, for all its issues, has made it a lot more accessible to a casual audience, especially in the wake of the great success of games like Rimworld. That said, it's still quite an undertaking to pick up and learn. Cataclysm has definitely always been a hard sell to others, though. Usually, their interest wanes as soon as they look up a screenshot. On the rare occasions that I've convinced someone to boot it up, they've just walked into the sight range of a mi-go or something and immediately died and lost interest. There's so much to talk about when it comes to both of them, but no one to talk about them with :(
Are archery militias fully-working again in DF? I think that was going to be part of the adventure mode patch changes, but don't remember the specifics.
If you mean the thing about them refusing to pick up ammo, yeah, it was fixed a bit ago. They can still be a little fiddly, but it isn't a nightmare getting an archery squad working like it was before.