Armstrong
No doubt one reason NASA picked Armstrong was precisely because he was not a wild card. There were good points and bad points to this. A more "fun" astronaut might have had more PR value, but remember, NASA was not intending Neil to be the only man on the Moon, just the first. Plenty of more interesting guys came after, and danced and hit golf balls.
Neil Armstrong never attempted to cash in on his fame, realizing that he was just the point man for a huge effort, and he basically vanished humbly into the woodwork, which is to his immense credit.