A polearm spammer might be more effective, due to the longer duration of the Stun effect after hit, comparing to 2 handers. Thats why you might see a lot of players ingame using Hafted Blade, or Long Hafted Blade, Glaive, or fast Staves, in order to "Stunlock" an opponent, which disregard being extremely lame, it's really effective.
Cheers.