For me, "quiet and less raspy" are (usually) a function of calls made of thinner material (.003, proph) with the reeds stretched very slightly. You can get really good-sounding soft clucks, yelps, tree calls, purrs, and kee-kees with two-reed and even single reed calls.
If you order calls and don't get the sounds you are looking for, you can often achieve those sounds with very slight modifications to the reeds (cuts, stretching, partial reed removal). Almost any call will get you where you want to be by doing those modifications a little at a time.