If you have the time for security and can stand the heat and humidity, go stand at the top of the SOUTH parking deck near Rwy 9L/27R. It is the longest and gets all of the heavies heading overseas in the afternoon and evening. If they're taking off to the east, they start right in front of you.
A known spotter puts videos on YouTube that are kind of hilarious with the commentary https://youtu.be/5RtxBEFoEfU