This isn't actually very funny so please refrain from making the OPs problem a joke. If you knew anything about angelfish you know they're omnivores and will eat other smaller living things too. Whether they killed and ate his gourami is questionable yes but your comment about him "starving" his fish is ridiculous and rather ill-natured, you know nothing about him or his fish keeping. Telling people when theyre wrong is one thing, but your post wasn't in the slightest bit constructive. That's normal, I wouldn't think it's your gour either as I dont think its been missing long enough to kick up a smell yet. If you cant find it what so ever I would keep a seriously watchful eye on your parameters over the next few day to weeks and also for any strange behaviour as a rotting fish can bring disease along with it.