I wonder if you're thinking of Jim Proudfoot. He was the first to really shout and scream on there and it was cringemaking. He then left, but they've brought him and other old stagers back for the WC as they needed too many to cope otherwise, and now he seems like the voice of reason itself compared with the bunch of hollering yobboes who regularly commentate for them.
The best commentator on that station, IMO at any rate, is Andrew McKenna but he's more of a summariser and hardly ever does actual commentaries. They gave him the Lions rugby series in Australia and he was superb. Now he's commentating at the World Cup and doing well there too.
Danny Mills was decent when he started out IMO, but his hypocrisy over the Suarez business has turned me right off him