I've never kept anything besides predatory fish...with Moray Eels being my forte.
My Porc was kept with a 15" Volitan Lion and a 30" Hawaiian Dragon Moray for YEARS, with no problems.
Once I aquired them, the Porc was kept with the same fish, in addition to an 8" Blue Throat Trigger, a 12" Red Coris Wrasse and eventually a 6" Foxface, in a 200gal. tank.
The Foxface was a refugee that I'd taken in, cause it had been kept in a 30gal. tank. Unfortunately, not long after I took the Foxface, it stung the Porc with within 2 days, the Porc was dead. Cause of death was the tissue around the sting began rotting away (necrosis). This was after the Porc was removed, QT'd and heavily medicated, with antibiotic. There was just nothing I could do save him.