Are there any teachers covering illusion magic?
If not, I nominate Ixidor of Otaria, Reality Shaper extraordinaire, from M: tG. He's the one who created Akroma, among other things, and whose illusions were so potent they actually had a solid shape.
Yes, Akroma is technically an Illusion, not an Angel. Go figure... :snigger:
Also, for absolutely everything he feels like teaching: Niv-Mizzet, the Firemind, also from M: tG. Of course, there's that little problem about him being the smartest being on Ravnica, and possibly in other planes as well. He's so smart, in fact, he makes an entire guild of mad scientists look like a bunch of brain-damaged illiterate morons.
On the flip side, he's a teacher everyone would respect. Hard to not respect a 50 feet tall dragon wizard who's smarter than everyone else in Hogwarts thrown together and multiplied by a magnitude or two.