Your TV Signal Analysis Results
http://www.tvfool.com/?option=com_wr...a3620e6beaea1b looks as though they are based on ZIP code only. The Kent / Covington area has some varied terrain so it would be worth your time to get specific when entering your location.
If you find yourself up on a convenient ridge or hill you may be able to use an attic or indoor antenna. If the TV Signal Analysis Results you have provided are accurate however, A roof mounted antenna will likely be needed. Your TV Signal Analysis Results list quite a few 1 and 2 edge signal paths. My experience with 1 and 2 edge signal paths leads me toward a larger, higher gain antenna to reduce the probability of signal drop-out due to multi-path and fading.
There are three 'full service' stations in the area: Channel 9, 11 and 13 that transmit on high-VHF all the other stations are now on UHF. This means that you will need a combination UHF/VHF antenna. I'm hesitant to give a specific recommendation without knowing that the location you have provided is fairly precise and your proposed antenna mounting height.
Finally, are there any stations that you 'must have' or 'don't care'?