These are all good suggestions for job titles. But, correct me if I'm wrong, the idea is to come up with a better name for our industry. My opinion is that "our industry" exists on the periphery of, or juncture between, many industries (Architecture, Engineering, Game, Film, Advertising, etc).
3d, Visualization, Simulation, Illustration, or Digital Art are good general descriptions of what we do within our industries. Fortunately, 3d is becoming a popular buzzword in Hollywood and the Tech Industry. People are starting to understand what we do, but I'm not sure what would be the best label to describe us. Keep in mind also that an industry is usually labeled after the final product and not necessarily the people that produce the product. 3D Rendering Industry sounds pretty dull, so I agree we need something a lot more sexy. What word best describes a beautiful image of something we dream to build?