First off, Welcome to the board Ed.
As for the tank, how long ago did this happen ? Moray eels are very disease resistant and very hardy animals. So it is no wonder he survived. Since you want to start the tank back up, Do you want to go aggressive or passive/reef ? If you go aggressive keep the SFE, they are not one to eat your other fish (your shrimp that is another story, thats there natural diet.) or harrass things. If you go passive/reef I'd find him a new home. SFE work in a reef but they can cause you problems and can eat your clean up crew.
What you want in your tank will be your choice. IMO If you do a good water change and check the levels in the tank to make sure everything is all right. Then add a couple of cheap damsels and wait two or three weeks to see how they do. If they die or start showing symptoms like your other fish you still have a problem, but after that time if nothing happens you should be ready to begin again.
How big of tank and what are you using for filtration ?
HTH
Brian