Krystal - I've never had the Chili's chicken tacos (like I said I always get the same darned salad!) But I have a couple ideas...
This recipe is my go to for mexican. I am sure you all have this recipe - but it's so good - it's worth mentioning. I got this recipe from my friend Jen - who made it every single Sunday. She'd put everything in the crock - go to church and when they got home they were ready to eat!
Boneless, skinless chicken breasts (as many as you need)
Salsa (not fresh - I use Pace)
Add all ingredients in your crock pot. I don't use measurements because I just eyeball it - and I really like sour cream. *Just make sure the chicken is mostly covered in the 'sauce' and you'll be fine.
Cook on low for 5 hours. When it's done, shred the chicken and serve. We use this in everything! Burritos, tacos, on nachos, on taco salad - the possibilities are endless!!
*As for the 'ranchero sauce' Krystal - I'd try it with the "Tomatillo Ranch" I posted? Or search 'ranchero sauce' online.