No, he still is, the SWTOR Encyclopedia makes it quite clear that those three were or are the top dogs, nowhere is it said the Emperor's Wrath surpass either of them.
The Wrath was not mentioned because he is beyond them. The Emperor would not choose a Wrath who wasn't capable of destroying any Dark Council member - probably all of them at the same time.
Why is the Warrior even considered to be more powerful in melee combat, when my Inquisitor and Shadow kicked butt in melee with their lightsaber?
I wouldn't really mix lore and class balance