1. Preheat grill to medium-high (or preheat broiler). Cook corn, turning often, for about 15 minutes or until kernels are tender. Let cool; cut kernels from cobs. Set aside.
2. Meanwhile, cook bacon in large saucepan set over medium heat for about 6 minutes or until browned; use slotted spoon to transfer to paper towel–lined dish. Set aside. In same pan, cook onion, garlic and butter for about 5 minutes or until onion is softened.
3. Add flour, paprika and cayenne to pan; cook, stirring, for 1 minute. Whisk in broth and bring to boil. Reduce heat to medium-low; add milk and potatoes. Cover and cook for about 10 minutes or until potatoes are tender.
4. Stir in reserved corn and bacon; cook until heated through and thickened. Garnish with green onions and Cheddar cheese.