Inuyasha. His fighting style is straightforward and in-your-face, which would make countering him an easier prospect. Having Gaara's sand coming at me from multiple angles and differing methods would be hell trying to figure out.
Assume you are in a dangerously small rowboat with one other person. Would you rather that person:
weigh 400 pounds (181 kilograms)?
be unable to swim, and so deathly afraid of water that he/she couldn't stop fidgeting?