any sharpnose puffers......most arothron species like dog face(except the ones that get huge...like map and starry puffers)....i think you could keep porky puffer as long as you do not overstock your tank......for triggers you can put almost any species that is not overly aggressive. queen/clown/undulatus are out of question. but, it depends on individual species. each has a different personality/temperament.