Ganondorf has magic powers, but I wouldn't consider him a mage. Agahnim is a good fit for the theme, though.
Entries:
1. Gul'dan (Oberon)
2. Kel'thuzad (Oberon)
3. Seymour Guado (Reivax)
4. Vivi (Reivax)
5. Li-Ming "The Wizard" (LZ)
6. Yennefer (LZ)
7. Yuna (DigB)
8. Lulu (DigB)
9. Phantom Dust Protagonist (Default)
10. Lohse (Default)
11. Quan Chi (Mad)
12. Shang Tsung (Mad)
13. Magikoopa (Mage)
14. Agahnim (Mage)
15. Black Mage (Reivax)