There are 9 attractions at Epcot we rate as "Not To Be Missed":

Not To Be Missed at Epcot
Future World Living with the Land
Mission: SPACE Green
Mission: SPACE Orange
Spaceship Earth
Test Track Presented by Chevrolet
World Showcase IllumiNations: Reflections of Earth
Impressions de France
The American Adventure

Not To Be Missed Attractions at Other Parks