Sounds like you need a bike with a slacker seat tube angle. Do you have really long legs relative to your torso length?
I had a friend once who had really long legs, and his thigh length was unusually long as compared with his lower leg length. He could never get a proper fit on a bike, and finally ended up going with a custom.
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Current Stable: Trek Emonda SL - Trek Top Fuel 8 - Scattante XRL - Jamis Dakar Expert - Trek 9700 - AlpineStars Al Mega