Aside from the obvious grooming of Oleg's beard and hair, he does have one other feature (or should I say 2?) working in his favor: his eyes, to me, strongly resemble Anastasia's eyes and, to some degree, Alexei's.
Don't know what to make of these claimants! HOWEVER, why did/do people think Anna Anderson looked so much like Anastasia??? I just don't see it. If anything, the few photos I've seen of her as a younger woman make me think more of Tatiana, and not even very much like her! Am I the only person who wonders how in the WORLD they ever thought she was Anastasia based on looks alone?