Jesco Chef's Rival Chopper
For the most versatility in any food chopper, take a look at the crank handle Jesco Chef's Rival Chopper. There are nine attachments to work with so you can do virtually anything that an electric food chopper can. Slice, dice, julienne, chop, juice, separate eggs, grate potatoes, and more all at the crank of a handle inside of a 26 ounce bowl. This would be the perfect RV food chopper because you could, in a pinch, make a gourmet meal without electricity.
The problem is for everything it does, you may be better served in just going for an electric chopper if you need this much functionality. However, the overall versatility of the Jesco Chef's Rival Chopper gets it on this list because nothing else is capable of so many different functions at this price range. Although the unit comes with a one year warranty, the blades are covered for a lifetime of use.