I've also heard that severums are highly peaceful, but the EBAs, while also a more peaceful cichlid, are still a cichlid, so I don't want anything that will fit in their mouth. I'll probably try and get full grown or at least mostly full grown and introduce them well before any of the big guys are large enough to eat them, in my experience, a lot of fish don't get as aggressive with long time tank mates that have grown together! That said, I hope all of them will help eat some of these Molly/guppy hybrid fry, I have a thousand of the things!Black skirts should be fine just don't buy tiny babies. Severums don't eat small fish in my experience. Not sure about EBAs, but they don't get too large and I have seen them in planted communities with small tetras. So probably fine.