what fish to add?

[Swimfins]

Any suggestions on what to add to this tank after its planted? 66g 4 foot long. Kep in mind plant safe fish.

I have 2 pearl gourami
2 swordtail
2 weather loaches
african ghost knife (6 inches long)
1 ornate male tetra (his wives passed on)
1 rainbow shark
2 flying fox (one might move, but they are juvenile and ok at the moment)

Thanks.

 

[Biotoper]

More ornate tetras so you have a nice school. However, they might end up food for your Ghost Knife once he gets bigger. How did the females die?

 

[Swimfins]

The dreaded ich, all females gone. I'd like something that schools...just don't want to go thru that again. I don' think my bkg will eat the bigger tetras, maybe little cardinals and neons.