They're badasses on the same level as any of the other major signatories of the Unseelie accords, though you're right they don't have the same degree of organization. I suspect if you moved them out of the WoD and into the Dresdenverse, they'd probably find themselves fairly able to organize, and quickly become at least as organized as the White Court. The Dresdenverse doesn't have the same assumptions about how difficult it is to coordinate supernaturals.
That being said, a lot of who the Forsaken are is dependent on a spirit world very unlike the Nevernever. The Forsaken change a lot if you don't also move over that spirit world, and the Dresdenverse changes a lot if you do.
