World of warcraft wasn't easy until WOTLK. AQ40, Naxx40, Black Temple, Hyjal, Sunwell Plateau, Serpentshrine Cavern. Ulduar was a shiny piece of grace in WOTLK in HEROIC, second only to HEROIC Lich King.

A lot of that content can run rings around FFXI endgame in it's day, heck pre-nerf C'THUN & M'URU say hello. Although each do have hard content they also have easy as pie content, nether compare to DAoC or Everquest pre-planes of power.

I have heard good things about HEROIC Ragnos but I stopped playing at the start of CATA.