None of the lenses there are particularly good portrait lenses. I'd save the money on one of those and opt for a 50mm f/1.4, 85mm f/1.8, or 85mm f/1.2 (ideally, depending on budget) above those options. A 70-200mm f/2.8 is another option depending on your budget.

There's a wide range of budget options (few hundred dollars to a couple of thousand) there, but all of them are pretty much superior to the lenses in your question in terms of portrait use.

If you're intended to do this in a professional capacity, avoid any of the lenses listed in your question - they're simply not at that level.

If your budget is tight and you want to get the 7D and one good lens, I'd recommend the 50mm f/1.4 for a couple of reasons:

• Its a pretty reasonable portrait lens on the 7D, the crop factor of the 7D puts it at the short end of the classic portrait length.
• Its not so long on a APS-C sensor that indoor shots become difficult to do in tighter spaces.
• It also serves as a reasonable general use lens. Anything longer and its difficult to use as a 'walk around' lens too.

If your budget is a little better, get the 7D, a 24-70 f/2.8L, and a 85mm f/1.8:

• This gives you a great walk around lens and general 'event lens' in the 24-70.
• Plus a classic portrait lens in the 85mm focal length.
• You'll be able to offer a wider range of services to clients.
• If money is no object, replace that 85mm f/1.8 with the 85mm f/1.2.

If you're going to be doing portraits and weddings (or any event in which your movement will be restricted) and your budget is really high, consider the 24-70 f/2.8L and the 70-200 f/2.8L (I'd also recommend a full frame camera, but that's a whole other discussion and budget) :

• This fully covers your classic portrait length.
• Gives you the flexibility to frame shots when you can't move around much.
• Its a pretty classic wedding set of lens, for good reason.
• Its fast enough to be used indoors still.
• Allows pretty much for a full service offering.