This is an awesome answer and I'll be honest lord I can't fault your logic one iota!
You didn't mention Gonzo though, surely any spirot-animal-muppet-deliberation must include Gonzo?
However having said that I think he'd be the last choice...He seemed a bit neurotic huh?
I reckon I like what you decided upon, a combination of a few Muppets is surely the way to go. Best of each...
So, it would be cool to see your transformation into your spirit animal, your muppetenisation. It would make a good post!
!ENGAGE 30