The Minotaur DOES appear in a Pauline Baynes illustration in the original book, but just as a bystander in the scene of Aslan's death.
I remember that photo! He was holding a torch or a staff or something...
And who can forget the list of wicked creatures associated with the bad guys?
"But such people! Ogres with monstrous teeth, and wolves, and bull-headed men; spirits of evil trees and poisonous plants; and other creatures whom I won't describe because if I did the grown-ups would probably not let you read this book -- Cruels and Hags and Incubuses, Wraiths, Horrors, Efreets, Sprites, Orknies, Wooses, and Ettins."
No cheers, unfortunately.