Yea, porkies are quite chill, but u need to monitor their diet as they get oder, cuz if u keep feeding them the same amount of food for a while, they will begin to grow more in appetite, but not be satisfied, thus...angry porky. A lion has the spines so it wont be swallowed by other larger fish, but there is still the posibility of another larger taking it headfirst, and the spines just fold backwards. And as I look at yer list, u also want triggers. Puffers and triggers are my caution rule with lions. Puffers/triggers get along, but they both have the nipping factor. Id say ditch the lion, get the triggers and puffer and u will have more options with fish. Its tough to find other fish compatbile with lions, but might I suggest a harlequin tusk in the lions place? They're great fish...