Jeez Guys!
You make it sound like eels and fish don't mix or that keping more than one eel per tank is dangerous.
In my 300 are 4 eels (two morays, one wolf eel and one spoon-nosed snake eel) along with soapfish, tangs, damsels and lionfish with no severe problem after 3 years.
In my 125 is lionfish, scorpionfish, a squirrelfish, a slingjaw wrasse and a moray, while the 100 contains many small gobies, blennies, dwarf sea bass and.....yep, an eel (either a conger or a snake eel...the jury is still out.
I DEFFINITELY wouldn't put a Tesselata in a 72 gal. tank (we're talking 5 feet plus) and particularly with a Snowflake.
IMO the really large eels should be left in the ocean or kept in species tanks only......I've been bitten by a two footer and SEEN what a seven footer can do.
People tend to forget that "eels" is a whole family containing several different genera that runs from 10" (safe with almost anything....it's the eels that are in danger with many fish in this case) up to at least nine feet with some speculation that there may be a 150 foot plus species that occurs at extreme depths.
As long as you do your homework, keep similarly sized species together, spot feed to keep down aggression and give them plenty of room, INCLUDING lots of LR there are endless commbinations of fish and eel that can be kept together.
Mike