Add 1 8-ounce block full-fat cream cheese and ½ cup fall-fat sour cream to slow cooker. Briefly stir to combine ingredients, breaking block of cream cheese into large chunks.
Add 3 14.75-ounce cans fire-roasted whole kernel corn, 2 large jalapeños, 1 teaspoon garlic powder, ½ teaspoon chili powder, 1 teaspoon salt, and 1 ½ cups shredded cheese of choice to slow cooker. Briefly stir all ingredients together until just incorporated.
Secure lid on slow cooker. Set slow cooker to 2 hours on LOW heat. During 2-hour cook time, occasionally remove lid and stir to blend mixture. Replace lid after stirring.
Toward end of 2-hour cook time, place large skillet on stovetop over medium heat. Layer paper towels on large plate and set aside.
When skillet is warm, place ½ pound bacon in skillet. Fry bacon until crisp, flipping bacon over as needed. Transfer cooked bacon to plate lined with paper towels and set aside to cool.
Once bacon has cooled, chop or crumble bacon into small pieces. Reserve 1 to 2 tablespoons bacon and small portion of ¼ cup chopped fresh cilantro to use as garnish.
After 2-hour cook time has ended, add remaining bacon and cilantro to dip. Stir well to incorporate bacon and cilantro into dip.
Set slow cooker to Keep Warm setting if needed. Top dip with reserved bacon and cilantro. Serve dip hot with tortilla chips, corn chips, or other vessels of choice.