I vote Arnold Schwarzenegger for George Stobbart!

 
Really!   Never mind about anything else in the words of  Meryn Trant "Too Old"

He aged like a fine wine! My boy Arny is the OG Terminator I know he can do it. Except maybe the scene with the Goat. A stunt double can be arranged for this scene (the goat is vile)

The man for the role has been among us all along:

Thankyou for your effort VP to forward the man for the role. I'm sorry  - the guy's still a little old & he seems to be wearing, although very nicely coiffured, a rug wig. Also, there's nothing wrong with red hair but isn't George blonde? 
If you don't mind me saying so I think  this 'HIdden Side of the Broken Sword' game  should remain hidden ....please! 

Actually, Randy Quaid would probably fit the bill. Not too old either.

   

Randy Quaid is 75 obviously in anticipation for the next Broken Sword game: The Twilight Years of George Stobbart