A yellow coris wrasse is a wonderful fish. Very active, colorful and for the most part very peaceful as well. I have one in with 4 other wrasses.
The one thing you should be concerned with is the dragonette. The wrasse will quickly deplete it's food source as they will both scavanging for the same food. Pretty much any wrasse would compete for the same food, including cleaner wrasses.
If you have a refugium where pods and such can multiply uninhibited and make their way back to the main tank, then there would be less of a concern but still a risk.
Just a thought...
Cheers
Steve