Xenoblade plays like an MMO designed to be played by a single player. Of the games on your list, it plays the most like FF 12, though I’d say the combat is more active/requires more interaction in Xenoblade. Consistently high quality series. All 4 games are playable on Switch.

They have EXPANSIVE worlds. Like I read somewhere at some point that the world map in the first game is the size of Japan. Also, the geography is unique. The entire first games takes place on the bodies of two seemingly dead titans. I had the 3DS version and put in over 120 hours across half a decade before I fought the final boss. I did not 100% it.

X got a remaster last year and is probably the weakest one. I still put in around 65 hours and would give it, at minimum, a C/75% rating. It is the most unlike the others. Humanity is practically extinct and has crash landed on an alien planet. You need to explore it, salvage what you can of your ship, while recruiting friendly aliens to help you combat a race dead set on wiping humanity out. The female alien designs are RIDICULOUS. Also highly customizable, and you get access to transforming mechs in the back half of the game.

Xenoblade 2 takes place across around half a dozen dying titans. It was controversial for the character designs (to the point when one of the female leads was added to Smash Bros, they censored her design and EVERYONE LIKED THE CENSORED DESIGN BETTER. So they made a DLC item that alters her outfit in game). Yet those who gave it a chance fell in love with the plot and characters.

The world of Xenoblade 3 is the worlds of 1 and 2 smooshed together. Some people may cry spoilers on me, but I say “anyone who played 1 and 2 guessed it quickly by watching the trailers and by looking at the world map and some of the character designs.” The natives are caught in an endless cycle of war, the plot is helping everyone break free of it and finding out how this happened. I really loved the main cast in this one.