What paper airplane is the best?
That depends on what you want it to do. There is no best real airplane, much less a paper airplane.
That very much depends on what you want it to do.. For a graceful kind of glider I would recommend the Floating Paper airplane. For a fast kind of dart I would recommend the Bottlenose Paper airplane. For a good all-rounder I would recommend the Rapier paper airplane. Instructions are linked below for making these.