So far so good. Just a slight contradiction, for we know that Moses and Jacob both lived after they saw God face to face.
Trouble is the Bible appears contradictory.
And the LORD spake unto Moses face to face, as a man speaketh unto his friend. In my opinion, here is how I would tackle this question. In the Greek text of Jo. John is declaring that no created being has ever seen God in His essence as Spirit. To do so requires special eyes and a relationship.