We have a Hyundai Elantra that we tow less than 3000lbs, good wide stance for stability. So with that said You would be good with similar vehicle BUT they will be Manual transmissions for the most part. There are a few automatics that can be towed but you will find they are fairly old anymore Old honda CRVs are an example. But remember if you buy used you will need to ensure that all components are up to speed, IE timing belts, brakes services etc.
I have seen the smaller imports towed but they lack power in general but are supposedly good around town. Costs for setup as a towd will also need to be taken into consideration. Camp world presently has a $55 install I think it is right now but you need to buy all from them. I did when our were installed, the cost of the baseplates were less than $100 difference off net, but then you have to go to a shop to install and rates at time were $75/hr for labor.
The ford ranger is an auto but supposedly can be flat towed, but again thats a new vehicle with its costs.