I haven't read the libretto recently, but I always thought that Jean-Michel had just turned 21. I think a 45-50 year old Georges sounds the most appropriate, although I had no problem with Grammer, and I wouldn't have any with Patinkin.
I'm leaning towards Mandy. He finishes up COMPULSION next week, and Harvey has said in the past how much he loves the idea of Mandy playing Georges. It would be a coup.
"You travel alone because other people are only there to remind you how much that hook hurts that we all bit down on. Wait for that one day we can bite free and get back out there in space where we belong, sail back over water, over skies, into space, the hook finally out of our mouths and we wander back out there in space spawning to other planets never to return hurrah to earth and we'll look back and can't even see these lives here anymore. Only the taste of blood to remind us we ever existed. The earth is small. We're gone. We're dead. We're safe."
-John Guare, Landscape of the Body