If your hair is truly coarse, then stay away from products that have protein near the top of the ingredients list. Instead, look for products that are moisturizing and use humectants, such as shea butter and aloe vera. Products that work for me are Jessicurl Too Shea conditioner (both as a rinse-out and a leave-in), Aubrey Organics Honeysuckle Rose (only as a rinse out). The Curl Junkie Smoothing Conditioner is okay and may work well for you if you live in a climate that isn't excessively dry.
I have success with the Kinky Curly Curling Custard as a gel and then I seal with Pura Body Naturals Cupuacu Hair Butter as a sealer. I usually use a nonsulfate shampoo, such as Jessicurl Herbal Cleanser, two to three times a week because I have an oily scalp.
3b/c, medium-coarse, low porosity, high density
HG: Jessicurl Too Shea and Kinky Curly Curling Custard
Shampoo: nonsulfate shampoo and Suave Naturals sulfate shampoo when needed