Mine is Ludo: A solid 2 to 4 Player board game.
Fun Fact: It causes a war in Hindu Mythology.
Second is Chess because dev abandoned their game.
2 players : Hellton Palace 3-5 players : Oriflamme
Odin’s Ravens for a quick game, Game of Thrones for a very long and infuriating game of strategy.
Mysterium among others already mentioned. Very similar core mechanic to dixit, but co-op and some what longer/more expansive.
The ones I usually carry around to introduce people to good boardgames are: Hive Portable it can get as complicated as chess, but is really easy to pick up for kids and adults. Carcassonne chill and you can pick and choose expansions Forbidden Island (and its family) it’s a fun cooperative game that’s easy for kids to pick up.
Champions of Midgard - Because Vikings! Its a resource management based game where you go on journeys to fight magical monsters. Its pretty tight and you can play a complete game in one-two hours.
Pandemic - I mostly enjoy this because it is a co-op game. You all fight the disease! That said the game mechanic is pretty fun and can be challenging.