Toast guajillo, ancho, and chile de árbol peppers in a dry skillet over medium heat for 30-45 seconds per side until fragrant. Do not let them smoke or burn.
Pour boiling chicken broth (1.5 cups / 360 ml) over the toasted chiles and soak for 20-25 minutes until soft and pliable. Reserve the soaking liquid.
Sauté onion in oil over medium heat for 4-5 minutes until softened. Add garlic for 1-2 minutes, then tomatoes for 3-4 minutes until they break down.
Blend softened chiles, sautéed aromatics, soaking liquid, vinegar, oregano, cumin, paprika, cinnamon, cloves, salt, and pepper until completely smooth, 60-90 seconds.
Place chicken thighs in a single layer in the slow cooker. Pour blended sauce and remaining 0.5 cup (120 ml) broth over the chicken, add bay leaves, cover, and cook on LOW for 6-8 hours or HIGH for 3-4 hours.
Remove chicken to a cutting board and shred with two forks. Discard bay leaves, adjust consomé seasoning, then return shredded chicken to the slow cooker and stir to coat.
For crispy tacos, dip corn tortillas in the orange consomé fat, fill with cheese and chicken, pan-fry until crispy, and serve with a side of consomé for dipping.