coming out of basically retiring just to stick my head in and say that izzy hands is not the sole human in the muppet movie that is our flag means death. izzy is the sam eagle role. sam eagle as izzy hands gasping furiously, monobrow just barely lifting, and protesting "it is not the way piracy is DONE, edward!". sam eagle as izzy hands turning to the camera and grumbling "WEIRDOS." in your heart you know this.
the only human is obviously lucius.
I think the flaw to the Only One Human approach is that people forget the Muppet Christmas Carol is the ONLY time it's been One Human and all the other movies are full of humans being as muppety as the muppets.
so like. yeah lucius is a human (in a relationship with muppet pete). olu and jim are humans but in the "still get wild musical numbers and a subplot" sense of amy adams and jason segel in the 2011 movie. ed might be a human but STRICTLY in the way tim curry was a human muppet in muppet treasure island.