Carter, easily. I mean, they're all brilliant at what they do, but out of those three Carter is the only one who isn't so full of herself that she would dismiss other opinions just because they either don't conform to her own or were simply made by someone other than herself.
Seriously, as far as people skills go, SG scientists got worse with every new show. But at least both McKay and Rush showed signs of improvement as time went on.
Hey, he's only human. And anyway, everyone gets to make mistakes, media personality or not. It's the repeat offenders that people need to worry about. I for one just hope that Mr. Brooks will take care not to be counted among those and will be happy to leave it at that.