Elephant Nose Need tank mates!

Okay, here's the rundown:
I have a 55G with one four inch elephant nose, 2 dwarf guarami, and a pictus cat. The Pictus and dwarfs I intend to move to another tank. I would like to find some compatible tank mates for this little fella. Right now my plan is to add two more like him and an African Black (or Brown) Knife.
The Problem is this: everytime I try to do research online, I get different answers from the so-called experts, so I am a bit confused. Some say that African Black Knives are a perfect match for elephant nose morymids, others say they will kill each other. Some say keep only one elephant nose per tank, others say three, while others yet say keep no less than five.
So I am hoping to get a response from someone who has actual experience with these fish in a home tank. I figure the "experts" I have looked up are going off a wing and a prayer since they all seem to be affiliated with a supplier of some type. (Can you say overcrowded, underfed, badly abused transfer tanks? hehe)