Off the top of my head, good non-anime includes Invader Zim, the modern Ninja Turtles cartoon, Avatar, the DCAU (Batman TAS, Superman TAS, Static Shock, Justice Leauge, Justice Leauge Unlimited, Batman Beyond, The Zeta Project), the modern He-man (the original is great too, if you don't mind somewhat campy stuff), Ben 10, and, of course, Transformers G1, Beast Wars, and Transformers Animated. All American animation.