I think they'd be fine as long as you make sure the Dragon's are able to eat (not pushed out by the others during feeding). I have a few odds and ends fish in one of my tanks with some Dragons. The Dragons will spend most of their time on rocks or on the bottom of the tank. They swim around occasionally (and looks kinda funny when they do, almost unnatural seeming for them), but tend to hang out on the rocks. Feeding wise I do frozen mysis and cyclopeeze at the same time. The fish tend to go for the mysis leaving the cyclo for the dragons which works good as they tend to eat slower, they're not stuck competing for their food. Mine do go for some of the mysis as well.