The villain from Jonah Hex is one.
Oh, and I will also put down Obediah Staine (I think that was his name), the villain from the first Iron Man.
And Whiplash from Iron Man 2.
Now, to qualify these, they are not one-dimensional, but if you are writing a report for school, Staine and Whiplash both lack something that is crucial to the sucess of any villain as a character.
Menace.
A villain that just does nothing is comedic or barely worth mentioning. In fact, his actions may add to the story. A villain that acts out for no reason is not really menacing because there is no tension or suspense. There is no drive. They become forgettable because they never fully existed.
But as for Staine and Whiplash, they did exist. They had relations, personalities, motives, and a driving goal. But they never seemed very menacing or threating. They were taken down kinda like chumps in the movies.
Yes, the arguement is that it was Tony's bad behaviour and alocholism that was the real villain, but it was more like a mid-life crisis thing than anything else. Now, if Whiplash was a real, true threat, but made Tony's serious problems lose none of their intensity, I would say it would add an element of unparalleled (correct spelling?) suspense because you can see the dilema and know that Stark has no chance in his state, and only a decent one if he gets better.
Iron Man 2 made the mistake of not putting enough menace in its villains, which lowered the stakes of the story, and while it was great, it only brushed what that little more work could have achieved.
So, I would say that the movie versions of Whiplash and Staine belong up here.