No firsthand experience here, but juts thought I'd say my straight-haired roommate uses one from LUSH. I always assumed their products were very natural, but after some poking around online I discovered that all of them contained sulfates! So if you do go this route, be careful, check ingredients, and make sure you aren't falsely lured by a brand's reputation. Best of luck!

3Aish; mid-back when curly, waist length when straight
Shampoo - Shea Moisture
Co-wash - Alberto V05
RO/LI - TNNM, L'Oreal EverSleek
Styler: Left em all at school :"(
Gel: GF Pure Clean, LALSG