might consider a "2 phase" approach
the 1st phase is long term
the 2nd phase is short term
the first phase will take a while to reach potential ...in the meantime, the 2nd phase will block out the "view" in 2-3 years
once 1st phase reaches the desired height - it will be time to remove 2nd phase
1st phase -
plant the green giant arborvitaes at bottom of your hill .....since at maturity they have an open "V" shape between them ..... stagger them, so one tree will be in front of 2 trees - that will close the "V" opening & will provide "blocking" in the crowns of the trees
2nd phase -
planted at same time as 1st phase
just beyond your bed in the foreground of first picture, plant a mix of plants mentioned by
@pepper23
and
@Ivan_N_Tx
I might add ....Indian Hawthorn, Native Rhododendron, Azalea, Camellia and/or Gardenia
