There are carpet eel blennies which look amazing and can be housed in groups, but they too are predators. Larger fish would be fine though with them because they have quite small mouths compared to actual eels. They only get 13" long maximum but still look quite like eels. Worth a shot I suppose, though they like to burrow under live rock.
Display tank - 24g nano w/ softies/montipora
I run electrical appliances underwater and enjoy injecting things with Kalk filled syringes.