If automatic is necessary, older Honda Fit (pre-CVT) is towable and about 2600 pounds. Chevy Cobalt and other GM compacts in that family (like HHR) are towable and right around 3000 pounds, as were the Cavalier and Sunbird that preceded the Cobalt. I don't know about the next generation (e.g. Cruze) which got all new drivetrains.
If you'll drive standard transmission, you have a wide range of front-wheel-drive subcompacts and compacts to choose from. Subcompacts ranging from 2500 to 2800 pounds, compacts just under 3000 to about 3800, with SUV crossover variations running somewhat heavier than sedans and low profile hatchbacks.
I'm towing a Fit, but mine is manual transmission, just a personal preference.
