The Hilton DTD is the closest, I think the furthest is the DoubleTree Suites.
There is also a Best Western, a Holiday Inn and a few others.
DW and I have stayed at the Hilton at Downtown Disney - it's nice! It's not a Disney resort, we really missed the special touches that Disney Resorts have - but it is nice!
There is a Wyndham, and the Buena Vista Palace & Spa - and the Hotel Royal Plaza.
Hope that helps!