Your TV Fool Report is only resolved to the block level. It may or may not be accurate. Consider following the instructions
here to generate a more accurate report.
But, for the report you provided, listen to ADTech. If you want a DB-8e then you'd need something like the Antennacraft Y10713 for channel 12 / NBC.
Since your channels are all close, you might consider something like an HBU-44 or even an HBU-55.
But post a better TV Fool Report. Union City is in a valley with mountains between you and the towers. Your exact location might make a huge difference.