I agree that the knight looks like he's been reworked or otherwise modified, though I still think the basic piece is Sacul. It looks similar to the one pictured in O'Brien's book. Same goes for the ancient. The nose piece on his helmet looks tacked on, too, and the sword may be a replacement. The basic body looks very similar to some of Mignot's, so maybe that was the starting point.
I think these might have been in that box of Timpo knights that Davey describes, because the seller, or someone earlier in the chain of ownership saw the feather plumes and lumped them together.
They're interesting pieces, to be sure!
Prost!
Brad