Dishine,
Glad to have you guys see the light and join us on Blue
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In my opinion, for what its worth, I believe any of the three (actually four if you include Cleric) classes you listed are desireable on blue. For one reason or another (maybe ease of Rogue epic MQ?), there has been an uptick in rogues over the last few months.
Of course, we could always use more tanks, but as you know, that can be a challenge to begin with without a helping hand.
Good luck, and glad to have 'ya