Honestly, I'd go so far as to limit wizards to only spells from their specialization school. So an Illusionist would be an Illusionist, and an Enchanter would be an Enchanter.
Aside from the obvious setting-specific Traditions of Defiler and an Arcanist that actually works, I'd probably most like at least one decent Elementalism-based wizard, and maybe a Star or Time-themed Tradition, too - we don't get a lot of either sort of magics in D&D, and that's a shame.