I agree they all are great players. But Bale is definitely the one who can be as great as them in future. I don't think at the age of 20,21 Roben and Ribery were as good as Bale is now. Though I still think Ribery is overrated. Messi is great,everybody knows. (despite the support of other world class team mates esp. xavi, iniesta). And it's not wise to compare Bale with Messi now. Should he be given a chance to play in team like barca, then we can compare.