Assassin
Battle Mage
Skirmisher Fighter
Battle Mage
Assassin
Mage
Marksman
Battle Mage
Vanguard
Juggernaut
Slayer Fighter
Noxians Support is(?) Missing and it's going to be a Warden
We have All classes in Noxus Expect Warden which means a supporter Tank of Noxus. so yes Noxus definitely needs a warden Champion who plays as a supporter/Peeler
Unless you consider Sion a support. Its hard to imagine a Noxian focusing on teamwork and cooperation considering how much that's frowned upon by the Noxian culture. Strength determines worth in their society, and thus accepting help from others signify personal weakness.
I'm not saying Noxians cannot be compassionate. Riven is proof of that - but she was exiled for the very same reason.
I cant realistically picture a Noxian support being accepted as truly Noxian, unless they are some sort of strategic battle mage akin to Karma, or a torturer like Thresh. Protecting others is simply not Noxian nature.
Noxian sergeant support, still pushing it. Hell, I've got my own lore and backstory for an angsty tragic officer support :P
