Since you are accepting non-hotel views. Matsunoma Lounge in the Japanese pavillion at EPCOT Center has a great view of the lake and Spaceship Earth. I consider it a lounge even though it serves some food, since people get drink there while waiting for dinner at the Tepanaki restaurant.
The Outer Rim at the Contemporary has a nice view of Bay Lake. In the afternoon, I like grabbing some reading material and have a couple glasses of wine. It is cool to lookup every so often and watch the water sprite, etc activity. At night you can watch the water parade there.