A look at some of my fruit trees

The trees around my little orchard are getting too big .Some of the fruit trees don't get enough sun.The first pic is of my lone apple on the Delicious hybrid.Followed by a bumper crop of Bell of Georgia peaches.The next three are pears an Asian whose name is Shinseiki ,a lone Bartlett on a tree planted last year, and again another bumper crop on my Atlantic queen.
I have to decide how many surrounding trees to take down .
My peaches are all over 20 yrs old which is about 140 in peach tree life .Decisions have to be made as to how many need to be replaced next spring