300 Litre Cichlids

[joshjames]

so im getting a 300 litre and like the look of some cichlids such as
bolivian ram
blue acara
cockatoo dwarf cichlid
festivum
keyholes
severum
german blue rams
angel fish
i dont want anytihng like oscars, convicts anythin aggressive normally but i no they get aggressive when spawning
also which of them would b ok with
cardinal tetra
cherry barb
clown loach
harlequins
gold gouramis
opaline gouramis
kissing gouramis
platys
BN pleco
corys

thanks for any help on this