The shape that you chose initially looks reasonable. I won't comment on the merits of all the different sections you considered as that stuff is not my forte, but if you faired your keel to to that foil shape I would be very surprised if that was the cause of your pointing woes.
There are so many other factors that could be contributing to your problem; and you've already identified 2 of them!
45 degrees is downright painful! What about your sailplan? Have you done every thing you can to improve those foils, before you start re-shaping your keel?