Cichlid "community" tanks are difficult. The smaller SA dwarfs require just as big a territory as cichlids three times their size. I would hesitate to put more than one species in a 35g unless they were the two mildest tempered ones (rams and keyholes).
The 35g is too small for mbuna, but is perfect for a Lake Tanganyikan community. Pick one species of shell dweller, one species of rock dweller, throw in a pair of calvus to cruise the open waters and you've got a nice litlle biotope.