3 or 4 at best. Kano, Liu Kang, and Kenshi.
Shinnok would be the 4th but only in one variation. His zoning tools are relatively safe and strong, but I worry with him against the anti-zoning tools of the game. He has one low and no overheads as starters. Shoulder and EX Shoulder is unsafe on block, Skulls can be blown up by a teleport combos on block (tested against Scorpions's teleport

), among other things. He isn't all bad, and has some strengths, but I don't feel he's as good a zoner as the other 3. Especially taking his other two variations into account. It would be all Necromancer for zoning.