Lay eggroll wrappers flat on a clean surface oriented like a diamond.
In a medium bowl, combine cream cheese, cheddar cheese, mozzarella cheese, bacon, jalapeños, ranch seasoning, garlic powder, onion powder, and black pepper; mix until smooth.
Place a spoonful of filling in the center of each wrapper, avoiding overfilling.
Fold the bottom point over the filling, then fold in left and right sides; roll tightly from bottom to top to seal.
Heat olive oil in a large skillet over medium heat until hot but not smoking.
Fry eggrolls individually for 3 to 4 minutes, turning occasionally until golden brown and crispy.
Remove eggrolls and drain on paper towels; allow to cool slightly before serving.
Serve with ranch or creamy jalapeño dip if desired.