If you ask people about the funnies game on the site, you shouldn't be surprised people name a few that aren't on your own shortlist
NFI
My personal top 3:
1) Space Quest 1 (the VGA-version is even a bit more funny than the EGA, IMHO)
2) Zak mc Kracken and the Alien Mindbenders
3) Monkey Island 2 (How much wood, would a woodchuck ckuck...)