Like Brave said, other than Tropical Coconut, all the Suave Naturals conditioners are protein free. VO5's Tea Therapy line is protein free, as are the Free Me Freesia, Sun-Kissed Raspberry, and Pomegranate and Grapeseed conditioners. VO5's Moisture Milks and Silky Experiences lines both have protein, as do the Kiwi Lime Squeeze and Shea Cashmere conditioners. Garnier Fructis's Pure Clean conditioner is also protein free, but it's also heavier than Suave or VO5 so it might be too much moisture for your scalp.
CG since 11/2011
2c /3a F /Mii, low porosity

Summer Products /Routine:
Clarifying: ACV rinses, Suave Professional Men Deep Clean Peppermint
Low Poo: Renpure Luxurious Argan Oil
Co-washes: VO5 Kiwi Lime Squeeze or Strawberries & Cream
RO: VO5 KLS or S&C, Cure Care
LI (if needed): VO5 S&C, VO5 SC, Cure Care
Stylers: FSG, AIF,
Tresemme Flawless Curls Bouncy Curls gel
PT: IAGirl's (link) as needed