I think a John Edwards balloon. He could comfort the crowd about what all the “dead” balloons from past parades are doing now.
Trojan Maaaaaan
Just to give the kiddies something to look at. 
Cecil Adams
Rasputin
Ozzy
Rush Limbaugh-he could lend some air to the other balloons!
Bib, the Michilen man
Wish I could spell:smack:
Goatse.cx would make an interesting balloon.
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Maybe someday…
Maybe the Enola Gay?
Betty Page
Jenna Jameson.
Tripler
Yeah! Why the hell not!