[thejeff]

Generally only those who go into hand to hand, or at least can survive it.

An Air mage may be able to destroy an army with Storm and Wrathful Skies, but get a few of them close to him and he's dead. That doesn't qualify in my book.

Now an equipped F9 Titan who does most of his damage with Falling Fires rather than a sword, but is quite comfortable standing in a horde of enemy chaff while doing so, would qualify.

For recruitables, Neifel Jarls, Dai Oni, Fomorian Kings, Mind Lords, Basalt Kings, maybe Eagle Kings? I'm sure there are others. Mostly only with a good bless and some research, though.