Here are the starting seven dwarves I've been bringing along to my last few fortresses. I'm trying to figure out the best set of superdwarvenly competent individuals to bring along, in order to get the fortress started off swiftly and end up with dwarves with desirable skills.
The starting seven are going to be most important during the first year. By spring of the second year, the fort will have somewhere around 30 migrants plus the starting seven. So the main use for the first migrants is getting the fort running.
To that end, I always take four miners to max out how much digging I can get done. It helps a great deal, and I usually have a fully functional fort by the third year.
I also take two farmers; a farmer/brewer and a farmer/cook. The primary industry that I want up and running in the first year is farming, so that I'll have a steady supply of booze. Food comes from several sources, but if I get farms up first, food can come from there.
And that leaves one dwarf for carpenter/woodworker.
The remaining skills that I scatter across my dwarves are Stoneworker, so we'll have an early craft, and the necessary Broker/Appraiser/Bookkeeper skills.