To which one might add icons of Saint Mary of Egypt as an emaciated crone, John the Forerunner carrying his head on a plate, and basically anyone with grey hair.
To criticize iconographers for reproducing these features out of "ignorance" of a rule invented by a 21st century internet expert is silly.
Showing signs of age and the effects of ascetic life is perfectly permissible. The degree of wizening in a face follows the same principle I mentioned earlier: enough to express the saint’s ageing or asceticism, without being ugly or grotesque.
Gray or white hair is not a deformity. Far from it - it is seen as a sign of wisdom and honor, in ancient cultures, up until recently in western cultures, and in scripture, such as in Proverbs 16:
The silver-haired head is a crown of glory,
If it is found in the way of righteousness.
One of the most recognizable of saints in iconography is the white-haired St Nicholas of Myra. Here’s one of the hymns of his feast:
Heir of God, fellow communicant of Christ, minister of the Lord, holy Nicholas; your name was as your life. For the radiance of your countenance bore witness to your intellect shining forth in your white-haired head and your innocence of spirit; and your serenity proclaimed your meekness. Your life was glorious and your repose is with the saints. Pray on behalf of our souls.