Eh, Priest and Mage seem off - that would demand religious and arcane traditions that would detract from the “dragon” part. I see Dracthyr casters being 100% relegated to the Evoker.
Monk also doesn’t work because they decided that monks are ALL PANDAS ALL THE TIME. This is an awful state of affairs, imho, but it does demand Pandaren specific training, and if Goblins and Worgen are disqualified, Dracthyr would absolutely be too.