Going strictly by your criteria, I'm going to revise my previous statemtent.
Valus would be good as well, but I think Eberron woul work perfectly.
It has:
1) Tons of organizations (from noble houses, to insane cults)
2) Religious Knightly Orders
3) Countries controlled by: A LN Hobgoblin Warlord, a trio of powerful Hags, and a sinister group of Rakshasas who have countless demonic henchmen
4) Definitely not low-magic... but not necessarily high magic either
5) Lots of feudal feel with a tinge of pervasive magic.
6) Druidic, nature loving orcs, plus they have their own nation (pretty much)
7) Lots of fairly lawless areas: the goblinoid kingdom of Darguun, the hag-ruled kingdom of Droam, the demon-infested realm of the... Demon Wastes, the idyllic Eldeen Reaches (with lots of druidic politics), the pirate-ruled islands of the Lhazzar Principalities, and the jungle nation of Q'Barra.
Really, lots of stuff fits what you're looking for, now just convince one of your players to run it while you run your campaign.
I don't think that Dragonlance would work too well, as outsiders... just really don't fit in that well.
FR might work also.