Probably Quentin Daniels, since they seemed to make the new guys do the the menial jobs until they worked their way up. And one of the main points of Galt's Gulch was that the technological innovativeness of its inhabitants had rendered a lot of menial labor obsolete. And men like Hank Rearden had worked in their industries for years, and knew (rather unrealistically) how to do every job on the factory floor as well as handle the executive offices.
Rand's point was that John Galt and his fellows were well-rounded individuals who had the ability to handle any challenge.
Agreed.
However, when looking at a potential bell curve of 'Gulch' residents, my guess is that you would have more Eddies than Quentins.