Blue-eye cichlids (Cichlasoma spilurum ) are quite a peaceful fish
Since when ?? ok while not spawning, but once they start they are very
aggressive, and once they start they will breed continually.

and from what I have gathered should be okay with dwarf gouramis and a
pleco. I've decided against the cories for now because I'm hoping to
evade
a turf war for the bottom of the tank.
Don't go for a plec, it will get too big, as someone else suggested get an
ancistrus, much better at keeping algae at bay, and a maxed out male won't
be more than about 5" long. No problems with adding the cories and
ancistrus, cories stick to the bottom, ancistrus will roam everywhere.
Dave
www.baarks.co.uk