Suave Naturals, Tresemme Naturals, and the cheapo VO5 are all mostly protein free I believe. I know the coconut version of suave has some, not sure about VO5, and right now I use TN's volume one for washing and it is protein free (little more moisturizing than the other two). This is assuming you're in the US though.
Medium porosity, medium texture, iii/2c
Ingredient buff and believer in the cones.