With an aggressive deep fringe antenna system you could add several channels to your lineup including PBS. I think you would be extremely fortunate to see Fox reliably, but you might get lucky. The system would use an Antennas Direct XG-91, a Winegard YA-1713 or Antennacraft Y-10713, and a preamp. This combination would need to mount high and employ a rotator.
I believe that getting above the majority of the trees would be necessary to overcome the signal attenuation caused by the vegetation. Can you consider the cost of a tower? A new
Rohn 25G 60' guyed kit is over $3000, which does not include installation or foundation. Used towers can be found with some searching.
On a tight budget, a Winegard HD7698P and Antennas Direct CPA-19 mounted above the roof would improve WGME and quite likely give you access to WPXT and WPME.