WHITECOLLAR REDNECK
Andrew Ross Sorkin quotes Jack Welch asking, "Give me a highly successful, unionized American industry." Someone in the comments comes up with aerospace, which is a good one, except it's pretty idiosyncratic and doesn't make you say "Yeah, unions and success in business really can go together."
The always-interesting Eddy Elfenbein suggests Hollywood, and pro sports. I wouldn't have thought of those, but they're certainly true. Of course, they're also even less likely to make you think "Yeah, unions and success in business really can go together." So I'm still thinking about this question and what it means.