Yeah, Jags....., Dovii, or most any Parachromis, any Amphilophus. Don't get me wrong Oscars are up there but IMO they get labelled as intelligent just because they're driven by their stomachs. Their constant begging for food is a huge ego stroke for their owners. It makes them feed needed. But why is it that they'll eat anything? Why are they so easy to net? Why do they always think you're about to feed them every time they see you. These are endearing behaviors, no doubt, but signs of intelligence, I think not.
Kind of like a dog vs. cat debate.