wow you sure do have a selection there LOL
i would have said angels but the barbs are fin nippers, hmmmmm
how about gouramis?
they are fairly hardy and pretty fish that dont school, in the 4ft i would go for 3 of the large kind eg the blue gourami, or the kissing gourami
cheers

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i have 2 community tanks
and i breed angels and bristle noses

i love my fishies