Nibali is clearly the strongest.
Konig put in an amazing ride. All the stuff from NetApp about how top 15 was their target was just very obvious expectations management. Without some silly/unfortunate time losses before the mountain stages, he would be on the fringes of the battle for third. Instead he still has an outside chance of a top 5 and will top 10 unless he crashes or gets sick.
Majka showed great strength for a guy who's not even supposed to be in the race. But he also adopted tactics straight from the Valverde school, so although I generally like him I'm glad he didn't win.
Bardet is hugely entertaining and looks like the real deal.
Nice riding from Pinot too.
Valverde, well, he did try a serious long range attack in a big race thus risking the integrity of the space-time continuum. But then he saved the universe by reverting to riding like a very stupid man's notion of a tactical genius.
Ag2r for Christ's sake tell Peraud to work with and if necessary for Bardet. As a team they just seem to have no control over their main riders, on or off the bike.