How do you like to smack people with foam, if your wars allow it? To be clear: "melee" is any Nerf tag that does not include firing/launching a foam or Boomco dart, rocket or ball from a blaster at long range and means any foam/sock implement that's designed to be used to strike with safely or to be thrown.
Personally, I have a few options I like, an electronic lightsaber, a Marauder sword, and a LARP reproduction of a Soviet entrenching tool made out of foam.