Not that these are bad games, but I feel like the weighting here is a bit heavy on older games.
The first game on the list released after 2004 is Fallout: New Vegas at #10 (and that's still 2010).
The first game released this decade is at position #29.
That seems like it's either got a fair bit of weight on older RPGs, or is saying that the PC RPG has really gone into a substantial amount of decline.
Ordinarily, I'd expect a ranking to tend to be loading towards newer games, if anything, because developers of newer games can see what people have done in the past and what worked, often have larger budgets, and have fewer technical constraints.
There are some old-game-favoring statements here that I'd maybe agree with. I wouldn't call it an RPG, but:
#14 - Jagged Alliance 2 (Sir-Tech, 1999)
Cholo: The king of turn-based squad level tactics games, which no competitor has been able to dethrone in fifteen years.
I'm inclined to agree with that. I enjoyed that game, have looked for turn-based squad-based tactical games, and I can't personally name a later game that I'd prefer to it. The later games in the series didn't really live up to the bar it set. The newer X-COMs have too much fluff for me. Silent Storm has some technical improvements like bullet penetration and destructable structures, but isn't as good a game.