Charlton Heston - hasn't been visible at all, and most people realize his more recent years have been in politics, not acting.
O'Reilly isn't an actor or musician - he's a political commentator. Of course he's outspoken, and nobody finds it unusual.
Schwarzenegger is involved as an influential politician. If he was still an actor he wouldn't interest anybody and he wouldn't be part of the campaign. It doesn't take any "great pains" to call him governor... that's what he is, and that's why people care what he has to say. I call him "governor" as well, it's not something I even think consciously about. His acting career is an irrelevant part of his past - only his detractors seem to be obsessed with that. He's a governor now and he's doing what governors do.
Anyway I've never Winfrey Oprah or Charles Barley.