Anime Expo 2014, one of the biggest cons of the year, went down last weekend. TwistedMangaLive was there with his camera capturing some of the best cosplay on show.
For reference, the Dark Souls stuff is around 0:30 into the middle of the three clips below. The Faraam Knight is harvestbuddy, the Elite Knight is RevebQ and Lautrec is Edgar Mayoral.
But you should really watch all three, because there's some amazing stuff on show.