insultant

A consultant who is willing to criticise the organisation that they work for.

As a consultant, he has specialized in strategy and policy for businesses, nonprofits, and government agencies around the globe. He is perhaps most famous for his direct criticisms of management, acknowledging that clients consider him a management "insultant."

Not surrounding yourself with only the 'Yes' men and women. Invite some 'Insultants' instead of just Consultants to keep you honest. Most consultants will tell you what you want to hear […]

insulting

One who delivers an insult.

The insult is one of the highest art forms. It is a form of minimalism, like the minimalism of an abstract artist. The one who insults is an insultant who, rather than use a canvas, uses another person. The insultant draws lines on a person to reduce them to the person they see and want others to see; and lines which they want the insulted one to feel.