well if you cant figure out what you want in it, Ill take the tank off your hands. Im always in the market for new large tanks. I have some fish here that would love a tank that big... and if not, Im sure I could buy more..
Northern Pike would outgrow the tank i think, but i do love the idea of a native tank. Largemouths, crappie, bullheads, bream, get a school worth of shiners to watch the bass chase, plant it heavily with natural looking plants and driftwood and rocks... that would make me happy personally