Here's a business man Muppet, he looks like someone I know. Kinda looks like a bad ass Bert. Maybe I'll get around to coloring him one day like the other over achievers.
The first thing that popped into my head when I thought "muppets". Beaker is one of my favorite muppets; I love his constantly horrified expression when working with his lab partner Bunsen. Every 'meep' he utters is probably a curse towards Bunsen.