Bottom Line: Tough to say for sure, but to go off of typical species behavioral characteristics I would say they would be fine.
Not sure how the other tank mates would take to a juvenile Engineer Goby (EG). When we first introduced our EG as a juvenile, it basically found a home and hid as it gradually grew larger. I would also think that the color and shape of each species would be an easy identifier and not lead to any territorial aggression, but it is truly hard to say for certain. I would think the Cinnamon Clown would exhibit more aggression than the Melanurus Wrasse.
I would give it a go, but have a back up plan as needed.
Our large EG does not care about any of the systems inhabitants and is really peaceful.
Best of luck and hope it works out flawlessly.