There is no free lunch. The light S&W revolvers are easy to carry but a bear to shoot. If you want a heavier, small revolver, they will be easier to shoot but harder to carry.
If you still want to be able to shoot single action but not have problems with hammer snags, then the revolver to get is the S&W mode 649:
You can't see it in the picture, but the hammer protrudes slightly above the shroud. So you can still cock it manually if you want. This is all steel, so it is much heavier than your airweight.