I loved cRPGs/wRPGS since Ultima 3 and make a point to try them all. Without a doubt, FONV is the best RPG of the last ten years.
Not the best RPG iv played, definitely in the top 3 though. It sits right under Diablo 2 and Baldours Gate 2(both are tied for me)
BG2 is a classic... but like a Elder Scrolls title it relys on scope to disguise the lack of player agency. Still, it has more character in a single party-npc than the entire Elder Scroll series.
Meanwhile, as a Dinosaur, I still struggle when people call Diablo an RPG. It's not even in the same genre. It's an action game with an inventory. Don't get me wrong, it's a fine game - but when I'm making a list of good RPGs it's not even in consideration.