Marinate chicken: In a bowl, mix olive oil, chili powder, paprika, garlic powder, cumin, lime juice, salt, and pepper. Coat chicken and let sit 10+ mins.
Grill chicken and corn:
Heat grill or skillet to medium-high. Cook chicken 6–8 mins per side until cooked through. Rest 5 mins, then slice.
Grill corn, turning occasionally, until charred (8–10 mins). Cut kernels off the cob.
Make street corn salad: In a bowl, mix corn kernels, mayo, cotija, garlic, lime juice, chili powder, and cilantro.
Assemble bowls: Divide rice among bowls. Top with chicken, street corn, avocado, pickled onions, and lime wedges. Drizzle with extra crema or hot sauce!