The Strongest Death Knight in Warcraft history lore wise

[spaace]

Well.. Arthas "Not as the lich king" is Arthas the Paladin... and he is nothing without frostmourne.

So Teron Gorefiend.

Saurfang would fall in the same category as "lich king arthas" because he was corrupted and granted powers.

[bufferunderrun]

I voted for Teron, he was the first DK , he was the most cunning of all, intelligent and a true tactician, he was never controlled like a puppet in the same way Arthas was and it's power was a mix of unholy dk and a warlock abilities.
What blizzard did with him in wow was absolutely stupid, i remember prior karazhan release how peoples speculated about teron being the last boss in it; intested they put him in BT i don't know why; i hope that somewhat they bring back him in a future xpack about the legion

[Jaojin]

Sure, Arthas is a badass and all. But Frostmourne is what gave him his strength! Without Frostmourne he was just another paladin. (Well, one that "killed" Mal'Ganis and Kel'Thuzad, so I'll give you that).
Teron was the first original Death Knight if I'm not mistaken, my vote goes to him.

To be fair... he didn't actually kill Mal'Ganis, and Kel'Thuzad all but asked the paladin Arthas to slay him as part of the Lich King's plans for the paladin (knowing full well he would be resurrected after Arthas fell).

Using Deathwing as a mount is pretty freakin awesome, and a full blooded caster is always more powerful than a hybrid caster/melee or a pure melee. So I'd have to agree that without Frostmourne, Arthas wouldn't be powerful.

So if your arguing between Arthas the Death Knight and Teron Gorefiend, then Teron wins. Because Teron didn't need a clutch.

[Redmage]

Gorefiend.

The wheel spins again.