Spike them, or buy a box of 20 penny nails. Chainsaw eaters, loggers little buddies, then they spray to kill and someone flames them at night, very entertaining.
Seriously by your photo the trans lines must be over your house. As long as the company can travers over with equipment then there is no reason to clearcut all the trees in your backyard. Maybe ask them if the trans lines are harmful to your health. What about the stories of problems with child development.
You may get the RE to come out to look at your situation to see if leaving the trees or looking at ways to have some kind of natural groundcover is possible. Chances are that the RE will find some common ground.
And for property value, well it is now what you paid, taxes. The next owner may notice the BIG wires overhead.