When Will We See the Release of Another Crowd Control Focused Mage/Support Caster?

I feel like Malzahar is the closest thing we have as of now to something like this. We don't really have too may crowd control focused Mages and Supports anymore after many tweaks and reworks. All of them are either Tanks or really used more for their damage/healing or shielding than crowd control. I want to play as a Mage/Support that doesn't bring damage, durability, or utility to the battlefield, but pure control. I want to be able to control the battlefield with precision. As of now, no one REALLY does this.

EDIT: I like the responses. Just like "What? No damage? Or a way to heal my damage dealer? What use are they then!?"