Well The Elder Scrolls *Skyrim* and Fallout series *4* are a great place to start.
Assassins Creed has some good ones.
Far Cry series *Primal is hilariously awesome*
Cyberpunk 2077 if you want a semi futuristic blade runner, shadowrun, cyberpunk type feel.
Grand Theft Auto 5 is fun and I liked the story.
If you like zombie games, Dead Island, Dying Light and Dead Rising are fun all in their own way.
Want a little humour with some rpg elements and gun play. Borderlands are good games too.
Having a cold war/1980's movie craving that needs to be fixed. Metal Gear 5.
Lord of the Rings fan then hit up the two Middle Earth War games.
Star Wars lover then check out Jedi Fallen Order hit that itch for me.
Also if ya want some good couch coop and ya got kids, or just don't have anything against certain games then most new Lego games can be fun. Hope those help.