It's useless to try and give "Best of All Time" awards -- figure as PCs capabilities change so do the games that run on them so the newer games are always going to be seen as better than the classics -- For example If Morrowind had been created to run on the PC specs that Skyrim was designed for or Skyrim had been designed to run on the specs that Morrowind had to deal with they both would have been totally different games - so there is no way to make a comparison between them for all time best.