When you say optimised - I assume you mean you are happy to kill a few days in the US flying anywhere to maz out some SCs?
Personally I would rate the US domestic F (MD80 or 757) slightly above the millenium seats on QF but behind the dreamtime seats you sometimes get.
Most non-trasncon AA flights (not american eagle who only have whY) have 2 class whY/F configs.
The easiest routing is something like:
Obviously there is limited availablility dfw-anc-dfw and it's not for the luggage carriers