The lolhammer/Great Maul.
It's the only fantasy, World of Warcraft weapon in WB ( besides to some degree the 2h cleaver, which also hasn't any historical equivalent, at least the weapon it is based on looks nothing like it ), has blockcrush which only requires the wielder to spam overheads spiced up with the occasional block, no meta game, near no skill required ( especially if wearing heavy armor + STR build ).
Yes, it is somewhat slow but block is still near instantaneous and all you really need to do is make the same attack over and over and over and people can't even block you, and if you're a half-decent facehugger they'll have a lot of trouble sidestepping before that big hitbox connects ( even sometimes when it first looks as if it hasn't ).
Blockcrush is a somewhat alien mechanism that was suddenly thrown into the block/attack game during beta ( where it earned its 'lol' prefix ) and though on weapons with a smaller chance of crushing through it isn't that big of a deal the lolhammer always were unbalanced in this regard. I'm seriously puzzled why the cRPG dev team have not corrected this now that they've properly balanced so much else in the game, like ranged, lolstabs, 1h feinting speed etc. I guess it requires that we see it abused a lot which for some reason fortunately isn't the case yet in cRPG ( compared to Native MP where they are used to ridiculous effect every time Rhodoks is in the field ).