Heat olive oil in a large pot over medium heat.
Add diced onion and sauté until translucent, about 5 minutes.
Add minced garlic, cumin, oregano, salt, pepper, chili powder, and cayenne; cook for 1-2 minutes until fragrant.
Add raw chicken breasts to the pot and pour in chicken broth.
Stir in white beans, green chiles, fire roasted tomatoes, and corn.
Bring to a boil, then reduce heat and simmer uncovered for 25-30 minutes, stirring occasionally, until chicken is cooked through.
Remove chicken breasts and shred with two forks, then return shredded chicken to the pot.
Stir in lime juice and Greek yogurt for added creaminess.
Serve hot, topped with additional Greek yogurt, cilantro, cheddar cheese, jalapeno slices, lime wedges, and tortilla chips as desired.