The Fae Courts were deliberately set up with the Queens as the most powerful beings roaming the mortal world, with the exception of Angels and Archangels who have their own restriction. This suggests this is the proscription of the WG. Even their major vassals are not close, nor the semi-divine like the Naagloshii. Winter could face down a collection of most of the other nations, which is why the accords exist. The Red Court, Black Court, Fomor and White Court (Cowl’s original alliance ) couldn’t defeat Winter, he needed the Titan for an overwhelming victory. Harry killed the Red Court, reformed the White and ‘defeated’ the Black Court in Battle Ground. Cowl was also banking on Titania not becoming involved, Titania though hates Harry more than Mab now.
Everyone else stays in the NeverNever in voluntary exile, are dead, powered down or in involuntary exile in Demonreach. The exception was Ethnui, who now thanks to the actions of The WG’s champion is now in Demonreach.
I wonder if Namshiel has redeemed himself with the WG in aiding Harry to enforces his proscription it certainly creates a wedge with the other Fallen.