I have struggled to find J frame grips that allow for good purchase with my big mitts, and a few have worked.
For carry, the Ergo Delta grip has been the solution for the last 4-5 years.
For target shooting, Pachmayr makes a rubber J frame Presentation grip that is roughly K-frame in size. It looks a bit odd on a snubby, but provides a great hold.
The smaller Pachmayr grips shouldn’t be overlooked, as the pinkie cutout is a very functional detail that allows for a wraparound grip.