you can compare any charecters from any wallace and gromit films. for example, the techno trousers and feathers mcgraw from the wrong trouses, preston the bulldog and shaun the sheep from A close shave,The cooker from grand day out,hutch and lady tonington from the curse of the were rabbit etc.You could do more charecters and compare them to celebs. so choose any charecter from wallace and gromit and compare them to celebs.
good luck.

I think Wallace is like John McCain and Gromit is like my dog named Gromit(he goes everywhere so he is a celebrity)

Hmmmm, tricky!
Walace... are there any bald celebritys? Hmmmm,Gromit I can see him being like... David Krum... thingy... Charlie Eppes in Numb3rs!