Two Worlds I and II are great games, way better rpgs than skyrim imo, and as a crpg player the graphics won't trouble you either.
Witcher I and II, and III once it comes out - it just has to be epic
Dragon Age I
And ofc Mass Effect 1-3, though the 2nd part is quite bad compared to the 3rd and especially to the first, but still a fairly good game.
I also can recommend playing Swtor, just doing your class specific quests - it's free to play and has an awesome storyline, so it's just like playing a SP game, though after that I got bored at it.
Also you should definitly play Dungeon Keeper 1&2 if you haven't done so yet.