Bethesda made Skyrim and the series, they have another series called fallout which is basically the same mechanics but post apocalyptic instead of fantasy. Some great games, and number 4 has mods on Xbox.

Outer worlds is basically fallout by another company (the studio actually made one of the fallout games, new Vegas, which is by many considered the best).

Oblivion is more standard RPG than Skyrim and can be more complex, but it's a fantastic game.

Gamepass is incredible, of you get gamepass ultimate you also have gold (play online, 2 free games a month) and EA access for EA games. Best part is they own Bethesda so fallout and elder scrolls (Skyrim) games are all available with gamepass for no extra charge. Their new upcoming space game will be available day 1 as well.

Enjoy!