I have always heard good vs evil is about who you sacrifice.

A) Good (period) will sacrifice parts of the self to improve the bigger picture.
B) Good idealists will sacrifice the self to improve the bigger picture.
C) Evil idealists will sacrifice others to improve the bigger picture.
D) Evil (period) will sacrifice others to improve the self.

Looking this way, Harry has shades of B & C during changes. This puts him below Charity, who seems to hang about more on the B side during Proven Guilty (of course so did Harry during that book).
Deirde in Skin Game is firmly at B, and hence, was better than Harry during Changes.
Nic in Skin Game is firmly at C, and hence is pretty nasty but not the worst. Aurora was here too, if she hadn't been so obviously wrong (we don't know about Nic yet).
Papa Raith seemed to be pretty much at D, as are most of the villains-du-jour (Warlocks, Sells, etcetera).

Category C makes for better villains, because you occassionally wonder if they have a point. Maybe Deirdre or Nicodemus really needed to die to save the world.

The thing is wont the use of such a large scale magical attack encourage other factions to demonstrate similar capability. You don't bring a knife to a gun fight, it is sure to cause an escalation so some kind of balance of power to emerge.

The Reds had long since been going for broke. You don't start a fight with Faerie after already being at war with the Council unless you're basically going for nr. 1. And nr. 1 would be reinforced by having an ungodly powerful weapon that even your allies would be worried about.

Oh yeah, another one:

The Dominions line of video games. The budget is low, but the fantasy kitchen sink approach works.

Where else can a Christian Roman Empire face off against the underworld Lizards, Deep Ones and Starchildren of Lovecraftian fame, the Nephilim of Judaic lore, the Phoenicians, Greek heroes riding the occasional Pegasus, the Allfather, Heart-ripping Aztecs, Satyrs and Panii, Steel-casting Germanic tribes, Druidic armies, Man-eating Amazons, Chinese from the Spring and Autumn period, African Witch doctors, fire elementals, semi-Zoroastrian winged Persians, Cavedwelling giants, Sidhe (with some pre-Sidhe thrown in the mix), Fomorians, Nordic Frost Giants, Rakshasas, Buddhist Apes, Enkidu and his kin, Japanese wild demons, Mermen (and their near-humanoid amphibian kin)... and since a short while, some undead Greek-ish ghosts?

Well, I suppose Harry nearly can

American Gods, anyone?

Yeah, though its Odin jars after too much Dresden Files

I think Snark Knight and jonas are right that we've got pretty compelling evidence for Harry having the power of naming. The eye flashes of Alfred and Erl as Harry named them, Mr. Sunshine's fear of being called Uri, etc. Naming in the bible was a power given to Adam over beasts in Genesis, it came directly from TWG. Maybe there's a connection there.

I also think Kindler might be on to something, noting Harry's similarity to Odin and other divine beings. Harry is the only mortal we have seen wielding raw will, as opposed to magic. Other than Harry, we've seen raw will from:

Ferrovax
Odin
Red King / LoON
Mother Winter
The Walkers

There might be one or two others (Mab maybe?) but it has been limited to nigh-immortals and Harry. Given that summoning Outsiders seems to be tied to mortals and their "free will," it seems to me that "power over Outsiders" could actually be "the ability of a mortal to directly apply their will," or "a mortal with enough will to effectively apply it directly." It is after beating Sharkface in a battle of wills that the Erlking says "Well done, Starborn!"  Naming seems to fit in with being a will-based power as well.

Leah probably deployed Will, or her disguise at Chichen Itza would have been poor indeed.

Or maybe his generation just sucks, I guess that's the other explanation for why the strongest of his generation is only top 30 or so.

And here I thought Harry delivered a challenge to the entire Senior Council and showed. And the Senior Council chose to deploy 3 of its members to handle him. Almost as if they would believe he's not all that bad, certainly more than just top 30.

Given natural progression from getting more efficient, Harry might well be stronger than any on the Senior Council (although by such strength levels, skill in a particular theme is more critical).

Can you tell me where you learned this?
I was thinking, since the queens ARE the courts they balance each other pretty well(SK when Harry actually sight gazes the queens)
And I can't remember the precise reply but there should be a woj on this in existence asking if EG is Lea's opposite and Jim saying something to the effect that it's not a role for role balance inside the courts but more of a... something? Cumulative effect?

Mother Summer more or less outright states it in Cold Days. Mab can beat Summer any day she likes, provided she's willing to forfeit reality and see herself dragged down by Titania.

Technically it was all self defense which is allowed under the Laws. 

I think Hannah Ascher would have liked that, if it were true.

But so far as I know, it's not.

That said - Harry didn't use magic to kill the red court, he used a knife. Ergo, he should be safe from the black magic taint (but not at all from the general mental degradation associated with having to kill a loved one, which may have made him callous about the death of others such as the hunter in Cold Days).