One fixed aim antenna will not be able to provide full coverage of the available stations.
If you plan to watch different stations simultaneously you may want to consider installation of a separate rotatable antenna for each TV.
I would suggest you use a Winegard HD7698P and an Antennas Direct CPA-19 preamp. The 7698 lacks coverage of real channel 5 but K05IV appears to be an analog repeater for a FOX affiliate. Other stations such as K21HX also carry FOX programming. If you want to, you can add a single fixed aim low-VHF antenna. The signal would be easy to 'insert' into the rotating antenna feed (if you install an antenna for each TV, only one low-VHF would be needed, not one for each TV).
The 7698 is a large antenna, in addition to a rotator, I would suggest using a thrust bearing to take the strain off of the rotator.
http://www.3starinc.com/antenna_rotors.html is a source for the NTE U-106 rotor kit and the TB-105 thrust bearing.
To minimize the signal absorbing effect of nearby trees, mounting on the roof, at the peak preferably, would be worth the effort. Attic mounting will limit the available signals.