I think
athalia is the safest bet. Here's Pete's picture distorted to make the underside a little more visible:
I think that's one of the
Mellicta group, not the
Melitaea group. That only really leaves
athalia, in that part of Greece...
As for the graylings, the books are pretty much agreed they can't be told apart from the outside! Tolman's photographic guide does show a
fagi from North Greece and it has the characteristic broad, diffuse white band, more or less obscuring the white points, just like western European
fagi. His picture of
syriaca, also from North Greece, shows a narrower band with white points outside it. But the general appearance of his
syriaca is quite different from Pete's picture. My conclusion: I don't know which to call. A local expert would doubtless know, being familiar with the local forms of the species.
I checked where you were on Google Earth and compared it with the distributions of
aristaeus (or
senthes, as it is now known by the splitters in that region) and
volgensis given in Kudrna (2002). Bad news - both are recorded from very close to there. In fact,
senthes is recorded precisely there and
volgensis just west, beneath the south-eastern corner of Macedonia. But that most likely reflects recording rather than actual distribution. So I don't know on that one either. I understood
aristaeus/
senthes to be generally commoner, so I would tend to record it provisionally as that. Again, a local would know better.
Guy