My favorites are the Primos calls. Specifically, I carry several of the stacked doubles...two separate frames each with their own reed or reeds. I call them my "cheeseburger" calls because they feel huge in your mouth, but they have a fantastic raspy tone. I also use the Primos single reed diamond cut calls for softer, more subtle calls. People have different size and shape of mouths so check around for the one that fits you best.
NWBuck