In general, it's is not the Leading Edge (LE) rake angle that makes some fins jibe better.
The "planform" of a more wave sailing like fin, with a lot of curve in both the leading edge and trailing edge tends to be looser, and usually will be much easier to jibe.
Perhaps what your are looking for is more of a "swept pointer" fin that combines a fairly vertical and shallow LE angle with a more curved fin the deeper you go.
Swept pointers in general jibe significantly better vertical pointer fins (unless you are pro level, and can make hi speed plaing jibes on vertical race and slalom fins) but you give up a little on top end speed and pointing angles.
Hope this helps,