If we're talking buildings/facades only, I'm going to think about facades that really enhance the experience before you even go through them, really add to the area themeing, and so on.
Epcot: Mexico pavilion building
MK: Haunted Mansion
Studios: Great Movie Ride (back, of course, when you could see it!)
AK: Tree of Life
There are other rides with better overall queue experiences, like PotC or ToT, but I think the above are all situations where the facade/building makes a huge statement.