Who would make a good main cast for the Good Omens movie?
As I see the characters, nobody would play Aziraphale better than Rowan Atkinson: A slightly clumsy, a bit out-of-this world angel with his little hobbies.
Crowley, that is more difficult. The actor who played Loki does not have enough self-irony to be this supposedly-evil, sarcastic, yet kind-hearted, at times funny creature. Maybe Simon Pegg could do it.