Preheat the oven to 425°F (220°C).
In a small bowl, mix olive oil, half of the cajun spice, half of the paprika, garlic powder, onion powder, salt, and pepper.
Place each corn cob on a piece of foil. Generously brush each cob with the oil and spice mixture, then wrap in the foil.
Bake the corn in the preheated oven for 30 minutes. For softer corn, remove after 30 minutes, brush with more oil-spice mixture, and bake for an additional 20-25 minutes.
While the corn bakes, prepare the mayo sauce by mixing mayonnaise, sour cream, the remaining cajun and paprika spices, lime juice, salt, and pepper.
Remove corn from the oven, let cool slightly, then brush with the mayo mixture.
Optionally, for a slight char, place the corn in a lightly greased grill pan and grill until lightly charred.
Top with crumbled cheese, chopped cilantro, and a sprinkle of cajun spice. Serve warm.