I would say generally no. Most of the less aggressive triggers, the Niger for example, tend to grow very fast. I have a Niger that has grown from 2-3" to over 6-7" in about a year. On the other hand, my Huma is still around 5-6" even though I have had him for over 6 years. Moreover, my Huma is one of the more peaceful fish in my tank. I suppose that my Huma would be ok in a 55g, but only if housed with very few other fish. Nevertheless, I still think he would outgrow a 55g eventually.
Did you check Scott Michael's book?