Preheat the grill to medium-high heat.
In a large bowl, whisk together lime juice, vinegar, 1/2 teaspoon salt, and 1/2 teaspoon pepper. Gradually whisk in oil until well combined. Add tomatoes, zucchini, avocado, onion, and jalapeño (if using), gently tossing to coat. Set aside.
Season chicken with the remaining 1/4 teaspoon each of salt and pepper.
Oil the grill rack, then grill the chicken until it reaches an internal temperature of 165°F, about 4 to 5 minutes per side. Grill the corn until lightly charred on all sides, approximately 2 to 4 minutes in total. Transfer the chicken and corn to a clean cutting board.
Cut the chicken into bite-size pieces and remove the corn kernels from the cob.
Add the chicken and corn to the tomato mixture. Stir in arugula, tortilla chips, and cilantro, gently tossing to combine.
Enjoy your delicious taco salad!
Tips:
You can grill the chicken and corn ahead of time (Step 4) and store them in the refrigerator for up to 3 days.