the origami glider? the flying blender? sorry, not great names but those stock propeller planes always remind me of folded paper or a blender's spinning blades.
My "horse with no name" is a double bay lifter that can go to minmus and back with landers (really anything that can fit the length of the bays), 6 kerbals (without using bay space for kerbal hauling) or into just about any kind of circular orbit around kerbin that you could want with lots of fuel to spare. I've used it to build space stations, comsat networks, haul large ship modules for zero-g assembly; it has really become my go-to lifter workhorse. I also put it together long before I figured out the gizmo buttons so it does look clunky but flies rock solid.