Which of the Fellowship would have gone ring mad?

I don't think it would be Legolas, simply because he is an Elf. As most of you said, he knows of the danger of the Ring and I think an Elf could resist the Ring if he or she really wants it. I think Legolas is strong enough to resist it.

Gandalf won't be it either. He is much more then what he seems to be. He also knows the danger, probably even better then the Elfs do.

Aragorn is one of the Numenor, so I think he could resist really long. He is also very wise, but eventually the Ring would take him.

The hobbits are easily to take for the Ring, so it seems, but they are so innocent that they probably wouln't even know what to do with it. Frodo also gets mad after he know more about the Ring.

So I think it would be Gimli. He knows what power is, and he knows how to use it. But he doesn't exactly know what the dangers of the Ring are. He would be next in my opinion.