I think you all forgot, that Thrall is a Warrior AND a Shaman. While his time with the Frost Wolf Clan, he learned some Shaman Voodoo, and now he is a one Man Slaughterhouse. Anyone ever been to Castle Dornehould in Hillsbrad? Do ya know why it is in such a bad shape? Because Thrall went there, Blackmoore pissed him off, and Thrall pissed back with an EARTHQUAKE. He pwnd the Castle Walls. Also, he has the complete Epic Set of Good ol' Orgrimm Doomhammer, that means: His complete Armour (I'm very sure this is Plate) and the Doomhammer. And with this gear he would Hammer the DOOM in all the others heads!
So, if Malfurion would be awake, and took the place of his love Tyrande, I dont think I could imagine if Thrall could beat him. I remember when Malfurion stood against Archimonde in the War of the Ancients. He nealy got him in a very bad position.
P.S.: Manaroth was only the 3rd in Command. The Leader is Sargeras the Destroyer (momentarly Bodyless...) his first Man is Kil'jaeden the Deceiver (his right Hand), the second Archimonde The Defiler (his Main Sorcerer), and then his Third Manaroth The Destructor (General of his Army). Whos interested, after Manaroths destruction his Protegé Azgalor took his job, a Pit Lord too. The Job of Archimonde is still free, so if any Warlock want it...impress Kil'Jaeden!
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Ich bin der Eingang in die Stadt der Schmerzen,
ich bin der Eingang in das ewige Leid,
ich bin der Eingang zum verlorenen Volk,
Gerechtigkeit bewegte meinen Bauherrn,
die Allmacht Gottes richtete mich auf,
die höchste Weisheit und die erste Liebe,
Geschaffne Wesen gab es vor mir nicht,
nur ewige, und ewig stehe ich.
Tu, der du eintrittst, alle Hoffnung ab.