Monty Python's "There and Back Again"

[Morthoron]

In regards to the casting of an epic of such pythonesque proportions, whom do you think would play the roles from the Hobbit? Obviously, the Python crew is getting on in age (with one cast member sadly deceased), but let's suppose they did a Hobbit send-up right after their Holy Grail send-up. In keeping with Python's flare for multiplicity, each fellow would have several roles in the film:

Gandalf -- Graham Chapman most likely (the 'Charlton Heston' of the group); or perhaps John Cleese.

Bilbo -- Michael Palin? He has sort of that wide-eyed innocence.

Lobelia Sackville-Baggins -- A small part, but I can think of none other than Terry Jones in drag (like his role as Brian's mother) stealing Bilbo's spoons.

Thorin -- Tough one. Any suggestions?

Elrond -- John Cleese as the world-weary Master of the Last Homely House, bored to tears with all the Elvish frivolity (immortality does have its downside, after all).

The Trolls -- A stuttering, cockney Eric Idle, a mumbling Terry Gilliam and perhaps Terry Jones.

Gollum -- Terry Gilliam. No one in the group can distort his face in such a manner as to look disfigured without make-up.

Beorn -- Again, either Chapman or Cleese.

Thranduil -- An effeminate Graham Chapman bedecked in a laurel wreath of autumn leaves.

Bombur -- Well, Terry Jones played a morbidly obese diner in 'The Meaning of Life'.

The Voice of Smaug -- John Cleese? I am sure Terry Gilliam would do the animation.

Thoughts?