I would imagine Quark as someone who is provisionally good. He has his own standards, which are generally well met by his compatriots, but there are some that he holds close that are at odds with his friends' values. Still, he doesn't work to actively harm anyone, and does choose to help even at a loss of profit (though he will complain, and loudly).
“I've noticed that about your people, Doctor. You find it easier to understand the death of one than the death of a million. You speak about the objective hardness of the Vulcan heart, yet how little room there seems to be in yours.” - Spock, The Immunity Syndrome
Leonard Nimoy: 1931 - 2015