Cesium wrote in post #14247527
Some people just don't bother reading the post to see what the budget is.
For under $500, I've heard good things about the Tamron 17-50. Although my preference would be an 18-55 kit lens and off-camera or bounced flash.
Specifically, it's the "non-VC" version of the Tamron 17-50... that's got better image quality than the VC version (Vibration Control, Tamron's version of IS) and is within your budget. It's one of the most affordable f2.8 midrange zooms.
Canon 18-55 IS would be the least expensive choice. But it's relatively slow (f3.5-5.6, if memory serves) and a bit plasticky. After all, it's a kit lens.
The Sigma 30/1.4 and Canon 28/1.8 might work, too.
With any of the above, you have to be careful getting too close, especially with portraits. There will be perspective distortions (such as make a person's nose look big and their ears look tiny) plus anamorphic effects toward the edge of the frame (an exaggeration that can make an arm look oddly big or entire body look "stretched"). This is just the nature of wide angle optics when shooting with them close to the subject. A zoom might be worse than a prime lens, which are simpler optically so are more easily corrected, at least to some extent.
Canon or Sigma 50/1.4 would give more "true" perspective rendering and is less prone to edge distortions, but might not give enough working distance.
The fact is, if distortions are unacceptible, at some point a larger work space might be necessary in order to make the shots possible.