In some movie version of "Frankenstein" that I saw a while back, the creature was portrayed as intelligent. I think it might have been the Kenneth Branagh version, but I'm not sure.
And in the Van Helsing movie with Hugh Jackman, the creature is too noble to be considered a "monster" by the monster hunter.
Even in a very old black and white version, the creature befriends a blind man before being harassed into violence.
So not all movies portray Frankenstein's monster as a mindless oaf.