Your reference portrait, fed to every shot via image-to-image (nano-banana-edit) so he stays the same man across the whole piece. Compare and tell me if this is him.
The historical portrait you sent: auburn-brown full beard, receding hairline with dark hair at the temples, gaunt ascetic face, deep-set gentle eyes, long straight nose. These are now the locked traits — every generated shot is seeded from this image, not guessed fresh.
This is the fix for face drift: we pick one canonical frame and seed all ~14 shots from it. Tell me if the likeness is right, or what to push — e.g. beard redder/greyer, thinner/older, more/less hair, habit browner vs. grey.