For whatever reason, when I first saw the question asked, I thought Philip Seymour Hoffman would be a natural Cerf (agreeing with the peanut gallery), but I went off the board when thinking of a Daly.
Maybe it's me, but I think Paxton Whitehead (British-born character actor best known as the stuffy econ prof in "Back to School") could pull off John Charles Daly. Admittedly, Whitehead is now in his early 70s, but I saw a recent photo of him, and he doesn't seem to have aged much since BtS.
JD