A quick sort through the database at the arborday foundation reccomends the London Plane tree for growing in our zone 7 here in Georgia. Besides the large size, deciduous and disease resistance features, it is "fast growing" which makes it an especially good choice for arbortecture. There are a very nice grove of these in Piedmont park in atlanta that prove their suitability for our area. They do reccomend well-drained soil which might be a problem depending on the location. It could be that planting in a deep trench with a drained bottom would solve this issue were a high clay hardpan hill the only available site. Appearently a low soggy bottom would be out of the question though.
Platanus x acerifolia
Red-brown scales flake to show cream-colored inner bark. Large distinctive leaves with lighter undersides. Fast growing, resistant to anthracnose. Prefers moist, well-drained soil and full sun to light shade. Grows to 75' to 100', 80' spread. (zones 5-9)