Gateway games generally have simple rules that are easy to teach non-gamers in order to attract new players into board gaming as a hobby. But they are great even for seasoned gamers to start off your game night or play between heavier games.
Sushi Go Party!
Lost Cities Card Game with 6th Expedition
King of Tokyo
Ticket To Ride
Jaipur (New Edition)
Tokaido: 5th Anniversary Edition