I guess my top five inside LucasArts would be:
1 - Indiana Jones and the Fate of Atlantis
1 - The Secret of Monkey Island 2: LeChuck's Revenge
2 - Grim Fandango
3 - The Secret of Monkey Island
4 - Full Throttle
5 - Day of the Tentacle
Yes, both Indi and MI2 reserve to be number one.