Good solo fish or pair for 56g?

i was thinking africans wouldnt work either, ive been out of it for a while but from what floor space is important for them so they can claim territory. Im realy more looking for center peice fish, something that will interact with people as they pass by, not so much a community tank. Thou who knows ive had projects like this before that in the end i ended up with the exact opposite of what i planned(75g with 4 dozen neons and no oscar:help:)
 
single specie i can think of then is, salvini/female jack Dempsey/severum/convict/firemouth/maybe a texas? sure there are a few more out there.
 
^+1

I think this really is a perfect setup for goldies or gouramis, MAYBE a small cichlid or two, though I personally dont see what the hype is about gouramis, and I don't know enough about cichlids to recommend anything.

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