Finally I see the thread actually making sense now..
Assuming you are referring to
Jexnell
and his Convict/Amphilophus duo? Definitely one of the few comparisons in this thread that seems to show some significant non-imaginary similarities.
How about this one: if you haven't the room for an actual Jelly Cat (Lophiosilurus apurensis), how about one of the Batrochoglanis cats? A friend sent me some pics of one he recently acquired, and the overall form, colouration, behaviour (and appetite!) are so striking it's almost spooky...but this one only grows to about 8 inches instead of 2-feet-plus. Same beady-eyed squint, same evil smile, same svelte figure...a peaceful, fairly inactive little monster which eats anything that will fit into its mouth, and even a few things that can't. My buddy says that he is working on training the little guy to take food from his fingers at the surface, which can probably be done without drenching the floor and terrifying unsuspecting onlookers as often happens with the real thing.
Personally, I would miss all that drama and entertainment, but if you keep your fish in a finished part of the house and prefer all the water to remain in the tank, I suppose it might be considered a good thing...