You will want something with thin blades, most of the one-hand folders on the market have edge bevels that are too thick for easy wood carving. Look at the lineup from Great Eastern Cutlery, you will find all kinds of blade/handle options.
If you really want a modern one-hand folder, the ones that I have seen with thin edge bevels are the Buck Vantage (multiple steel options there), Kershaw Skyline, or Benchmade mini Griptilian. The Spyderco Caly 3 ZDP has a really thin edge bevel, but at that high hardness you will need to be careful about putting side loads on the edge by turning or twisting the blade while it is in the wood.