All of your major stations lie about 15 miles due south of you, with your CW station about 20 mile due east, You will have a mix of both VHF and UHF stations after Feb 17, so you need capability for both. Additionally, the signals for most of the stations are blocked by 2 sets of hills between the transmitters and you, significantly weakening the signals. A multi-directional antenna is not an option here: where signals are blocked from primary view, you need a high-gain, highly directional antenna to pull the stations, even at a distance of only 15 miles. As for the CW station, you have a clear line of sight to their transmitter 20 miles away, so a small UHF-only antenna combined with a directional VHF-UHF antenna should solve your problems.
I would suggest using a Winegard HD-7696P VHF-high-band+UHF antenna aimed at the Knoxwille transmitters south of you. Add a Winegard PR-9014 antenna aimed at your CW station, and combine the two antenna with a Channel Master 0512 Jointenna tuned for channel 20 so oyu can see the CW station. Run the output of the Jointenna into a Winegard HDP-269 preamplifier, and run the coax cable into the house, where you will put the preamplifier power supply. This antenna system will power up to 4 TV tuners without degrading the signal if you use a high-quality 1Ghz or better splitter after the preamplifier power supply.
http://www.winegard.comhttp://www.channelmaster.comhttp://www.pctinternational.com/channel ... lation.pdf