How about the Maquis? Their refusal to give up star systems to the Cardassians and trying to drive the Federation into another war, I think you could consider that greedy. I'm sure there are other examples of people in the Federation only interested in exploitation.
eh? They weren't trying to drive the Federation into war, nor were they interested in "exploitation." They just didn't want to move from their homes, and they ended up having to defend themselves against Cardassian violence.