Is it possible to make a villager you cannot interact?

I am trying to make something like the morph mod, where you can become a mob, but with a villager, when I want to right click, I interact with the villager.

How to make it so that I cannot interact with a villager, even without a profession just with commands?

Edit: Sorry, I meant to stop villager interaction completely. That means no trading, no nodding villagers. And so I can open doors like it's not actually there.

There is. It is a villager that has a profession of "nitwit" it doesn't have any jobs, and it does nothing, also it is spawnable on survival.

to spawn a nitwit villager with commands, just do:

/summon villager ~ ~ ~ {Profession:5,Career:1}

(from Is there a command to specify which type of Villager to spawn?)