I'm reminded suddenly of another role Chris McDonald played that really wasn't portrayed well. Granted, the blame for his Jack Barry has to rest mostly on the production staff of Quiz Show, but if you've ever seen 61* where he played Mel Allen he was not particularly good in that because he didn't sound anything like him.
(For those who don't remember, Mel Allen was the long time voice of the Yanees and hosted This Week In Baseball up until his death in 1996. He was brought back in claymation form for a couple years when Fox took the program over. 61* of course was an HBO movie made about the 1961 home run record chase.)