Provided you have tried the above. (sheet tension, downhaul, outhaul, mast rotation)
The middle of sail is where the highest percentage of power is.
So middle of the sail has to be correct first, my guess is 8 percent draft at 45 percent back for the middle (including mast)?

Coordinate the top & bottom telltales with the middle of the sail.
Try making the middle of the flatter or fuller.
Or try making the top flatter and bottom fuller,
or try making the top fuller and bottom flatter using different weight battens.
Basically, you are trying to change the angle of incidence of the sail up & at the mast. Sailmaker?

From looking at a lot of square top mains the top diagonal batten appears to always flatten the sail to lower the induced drag?
There are also threads on spreader rake and tension on how it affects mast bend may help.