I don't know why you'd want a super-aggressive eel for a community or even a single tank. If that is what you really want for a moderate sized tank, get a black margin moray. They are nice looking, stay reasonable sized and will try to tear your hand off if you get near the water. My tank only had the top inch or two of the glass scraped because the eel went for me every time I got near the tank. My eel bit me once, it was the most painful bite I ever suffered, and got nasty infected. This eel also killed a juvenile clown trigger. After that, I never kept another fish with it. When I was trying to catch it, because I finally found a home for it, after two years of trying to unload it, it lunged out of the water trying to bite my face. Have fun. And that eel was just a little over 2 feet.
There are a lot of fish that have attitude and some aggression that aren't off the scale like that black edged moray I have. That one was too much fish for me.