Oak will be one of the last trees to leaf out, JW, so be patient with it. I sure was sad when I took the time to move that big oak tree away from my goldfish pond, and then that terrible winter a year ago killed it anyhow. Booo .... it was pretty large to have moved, but I think I dug it up and transplanted it at the perfect time. Just wasn't established enough for that winter. I may get a sprout from my sister and BIL's yard. They have tons of oaks, and it's just a matter of finding one in the early spring, after it leafs out, and getting it dug up before the roots go too far.
I would love a weeping cherry or pussy willow. I have two pussy willows that my GF grew from seeds. One she cut back and bunch of times, and the other I let grow and it's about 4-5' tall branches (about 4 of them), so I guess it would look better cut into a bush instead. I may leave one branch tall, and cut the others all the way down, and see if it will grow into a tree instead. The other one is about 3' tall, and 2.5' in diameter, and cute as can be, too. Someone mentioned getting pussy willow branches, and that they can be put into the ground and will sprout. Is that true, does anyone know?