I think Cheney can be a riot, and has lots of charisma, but not the 'right kind'...it's hard to be specific, but I guess I mean he's too true and too smart to play the game without adding enough nods and winks to show us that he's just clowning, playing down to the crowd.
Bush is sincere when he speaks, and even Clinton was a genuine fake. But Cheney, like Rumsfield, is a player, unable to tell the lies that matter.
I don't think I understand your post. ("unable to tell the lies that matter")
The way I see it is that both President Bush and Vice President Cheney have charm, wit, and integrity. Their styles of delivery are different, but they are not the same person.