I say the impersonator. I have one of Tonto, Frankenstein, and maybe Chris Farley (its not in my hand right now).
I didn't get it because I wanted a Frankenstein and Tonto card, I got it because it was a Jon Lovitz, Phil Hartman, and Chris Farley card. If someone wants to tag Tonto and Frankenstein on it, I have no problem with it, but I would say most collector's have the card (or cards) because of the sketch itself and impersonator, not so much the person they were imitating.
With that in mind, I need to look for other cards in that set, like Chico Escuela... and Toonces.
Royal Card Review is my blog if you feel like checking it out, thanks if you do!- royalcardreview.blogspot.com/
In the process of updating my collection so don't trust any of my lists right now.