'Underrated' might be a trouble word.
From the article, the author poses - "But the dominance of franchises like Elder Scrolls, Fallout and The Witcher means that there are tens of RPGs that missed out on the mainstream spotlight."
I think the keywords are mainstream spotlight. Nothing on that last hit the mainstream gaming spotlight, let alone mainstream media spotlight. Fallout 4, Witcher 3, Skyrim - those are RPG's that catch even CNN's attention. Even, arguably, stuff like Mass Effect and Dragon Age were big enough / had enough tv commercials to maybe be considered mainstream audience penetrated.
In a depressing way, K
A-R technically can be considered mainstream aware due to the very publicized legal and financial issues of the developer, but all that attention was NEGATIVE. Hence 'underrated' could still really be applied.
As much as V:TM-B, PoE, and even (arguably the most successful/highly regarded generally of the bunch) D:OS get praised in RPG forum circles, that's not even mainstream gaming. Maybe it's mainstream RPG gaming circles spotlight, but you are REALLY abusing the word mainstream.
My two cents on the veracity of the list.