Originally Posted by
wariofan1
The hardest bosses in Vanilla for when it was current content would be Razorgore, Vael or Chrommagus. Vaelastrasz mostly because it was one big burn phase, and the rotations wasn't very complex back then (FROSTBOLTFROSTBOLTFROSTBOLT), so it was really just a horrendously overtuned gearcheck.
Razorgore was absurd, I have never seen a boss get hated so much as Razorgore on BWL release, the forums were flooded by ''NERF RAZORGORE BROKEN SHIT'' every 30 minute. Even when people had downed Nefarian Razorgore was still the biggest challenge in BWL. Flooding with adds, and people having no idea how to control him.
Chrommagus only because of the hilarious ''Pull him to Vael's room'' theory because of the trailer. Oh yeah, and the stupid time sand farming.
Other hard bosses in Vanilla include Twins in AQ40, Viscidus as Alliance, Huhuran was a bitch too, Four Horsemen (only because you needed a raid leader that was really insane at organizing the raid), Sapphiron and Kel'thuzad.