Yoo Hoo, Jeff!
My hunch was right! I figured it was Corey Burton, and it was. Here's what my good friend inside Disneyland wrote me:
"Corey Burton is the voice actor who did the impersonation of Paul Frees for Nightmare before Christmas overlay at Haunted Mansion. He also re-created Frees in the Pirates of the Caribbean Enhancement a few years ago. (remember the NOT politically correct upgrade!). He voiced the new Gluttonous Pirate (used to be "Pooped Pirate"), who now talks about chicken legs as he keeps the turkey wing away from the cat popping out of the barrel.
Even when I listen to both these voices (Christmas Ghost Host and Gluttonous Pirate) up close on the monitor speakers in the sound room, I can hardly
believe I am not listening to Paul Frees. Corey Burton does a great job.
He also did the voice of Gaetan 'Mole' Moliere in Atlantis, as well as MANY other Disney character voices. You can do a search of his credits on http://www.imdb.com. There is also an official website for him at http://www.coreyburton.com/ ."
Glad I could help, Jeff!
RichKoster, Disney Echo modEARator