Community Tank - Centre-Piece Fish Suggestions?

German Blue Rams, yes.  Bolivian Rams, no.

I went for a pair of dwarf gouramis; beautiful!

My new male dwarf gourami....
 

Lovely fish.  Congrats.

A better pic of my male dwarf gourami......

Very, very nice!!!

there is a book by Interpet called community fish. which lists what u can and cant keep together. main concerns to watch out for that i have personally witnessed , are 

shcoaling fish , like danios, and minnows etc , must be kept with at least 5 other wise they will harass other fish looking for them to play , and things like angels that are slow will get stressed by an energetic danio wanting to play, 

fin niipers tiger barbs  cannot be placed with angels or bettas unless in a large tank and enough tigers to keep themselves amused. 

territorial fish , Red tails sharks , ruby sharks , only one or two per tank , as long as you have hiding spots.  

watch out for shop owners selling u 6 ruby sharks just cause they look good together , mine all killed each other because of territory ( how on earth they kept them alive in store i do not know ) 
 
my last line up was guppy, mollys , plattys , zebra danios , pearl danios , mountain minnows, 2 angels , a plec and a silver shark , harlequins , 
(silver shark and angels were not at the same time )

i had the joy of having a pair of pengasius cats for a while but unfortunately they did after 2 years , and someone putting a shell in my tank and not telling me .