Hey doc, I actually don't think it would be a problem. I've had a SFE with clowns and dwarf angels before. My zebra eel has also been around dwarf angels, small anthias, and small wrasses with never a problem.
55galSW: if you get a small SFE it would work much better since your tank might be a little small for a full grown one. Those baby SFE's couldn't eat a peppermint shrimp, let alone a clown fish.