This is a very important question, so choose wisely.
The contenders:
Knives
As seen in Wolfenstein 3D, Return to Castle Wolfenstein, Wolfenstein: The New Order, Wolfenstein Youngblood
The Boot
As seen in Return to Castle Wolfenstein
Hatchets
As seen in Wolfenstein: The New Colossus and Wolfentein Youngblood
A Pair of Pipes
As seen in Wolfenstein: The Old Blood.
Various Melee Weapons You Find Lying Around Isenstadt
(Including Axes, Pickaxes and Sledgehammers)
As seen in Wolfenstein (2009).
The contenders:
Knives
As seen in Wolfenstein 3D, Return to Castle Wolfenstein, Wolfenstein: The New Order, Wolfenstein Youngblood
The Boot
As seen in Return to Castle Wolfenstein
Hatchets
As seen in Wolfenstein: The New Colossus and Wolfentein Youngblood
A Pair of Pipes
As seen in Wolfenstein: The Old Blood.
Various Melee Weapons You Find Lying Around Isenstadt
(Including Axes, Pickaxes and Sledgehammers)
As seen in Wolfenstein (2009).