Epcot perhaps - but the previous poster makes a good point that WS is mostly outside. It seems like every single time we visit Epcot, it rains. And we're always in World Showcase. However, most of the lines for FW attractions are inside so that makes it easy. You can escape to the Living Seas for an hour or so, Universe of Energy is a long inside attraction, The Land is a fun pavillion to spend some time in with the food area, the environmental film and the boat ride...and now Soarin! I think my vote is Epcot. Definitely not AK - we need good weather to be walking around AK.
PamNC