I've had good success with alder, black poplar, crack willow and weeping willow. All of these will grow quickly whereas Scots Pine which you mention is a lovely tree but comparatively slow to grow.
Crack willow is a favourite of mine. It's considered an invasive species in some countries. If you snip branches off and stick them in the ground, they'll grow. I planted about 200 of these 18 months ago varying 6-10ft and i'd say 175 of them rooted and have grown 2-4ft in that time - remarkable!
Weeping willow they do say to be careful where you plant it, if it's near a stream you'll have no concerns, but be aware anything manmade (foundations, pipes etc etc) it will reportedly search for water to the extent it will break in. Can't comment if this is a story or not as haven't chanced it.