Such choice...
Barnes is a clueless knob
Butler is a crap poet wannabe
Various Irish commentators on the Irish broadcasters are so laughably biased it's amazing they have the jobs
Jonathan "numbers squeak squeak" Davies is completely partisan and often cuts across other commentators. England vs Wales where all you can hear is partisan commentary from Butler and Davies? Crap.
I think top of the list would have to be Barnes though, I'm not sure if he is even looking at the same screens as anyone else. I mean the guy could probably be watching a washing machine with a list of names in front of him for all the insight his commentary offers.