Parks for a novel game design, gorgeous artwork and tactile pieces. Mid complexity.

Pandemic Legacy for one of the best experiences you'll have with the same group of friends over months (cooperative, play through once over 12-24 sittings). The game builds in complexity as you play so it starts reasonably simple (though the first season starts with the basic ruleset of Pandemic so if you've played that it's a head start but not necessary).

Kingdomino and Cascadia for quicker terrain building games, I consider these fairly similar though Kingdomino is quicker and simpler. These I can play with anyone.

Paperback if you already like word games like Scrabble etc, and want to dip into playing a deck building game.

The Crew if you like trick-taking card games, it's a co-op variant to games like Bridge or Euchre.

Carcassone is an oldie but goodie. Very social compared to many competitive games, as though it's turn based everyone wants to have their say for what you should do with your piece. Compared to e.g. Wingspan where you're largely ignoring/out of the loop for what's going on with everyone else all the time.

Played Pandemic Legacy over the course of probably a couple of years with some friends, gee it took some time but we got there in the end.