What is a good bushy tree that I can plant in the mid-west that would shield me from neighbors?

Question

Has to be fast growing.

Answer 1

soil and water conditions will make a difference. In my experience, Bradford pears do grow fast-- and have soft wood that breaks limbs with a load of ice-- ah yes, Midwest winters!!. Willow is dicidious (loses leaves in the fall)-- so then you have no screen half of the year. There are fairly fast growing evergreens-- check with a local nursery to see what's good for your yard.
good luck

Answer 2

Bradford Pear. It grows fast and produces lots of privact

Answer 3

Cypress or weeping willow.