John Gallagher ended up barely scaling the heights of his potential - choosing to defect to league when he did.
Gavin Henson was once the hottest property in Wales and a British Lion to boot, but his career came to little as he became more interested in reality TV shows. Not only is he a bigger waste of talent than Cooper, he can also outdo the Australian as a recidivist off-field offender.
Henson's litany of crimes are extensive - ranging from drunken, violent antics on a train, to fighting with Toulon team-mates in a nightclub after abusing them to being fired by Cardiff for drinking on an early morning flight.
Cooper would need a few more indiscretions to outdo Welsh No8 Andy Powell who was caught drunk in charge of a golf buggy on a motorway in 2010 and then moved on from Wasps after he became involved in a bar brawl that ended with him being smashed over the head with a bar stool and losing two pints of blood.
Danny Cipriani, the troubled English first-five is way ahead of Cooper in the bad-boy stakes: the former Melbourne Rebel seemingly able to cause trouble in a phone box, while former Wallabies Wendell Sailor and Lote Tuqiri can play the trump cards of actually having had their Australian Rugby contracts terminated.
And then there is Zac Guildford - his drunken, naked episode in Rarotonga last year, which followed other high-jinks, earning him the No1 spot as the world rugby's worst serial offender.