Generic 6M Composition

Hello,

I am interested in beginning to run dungeons with my hunter. The question I is what the party composition should be for these introductory dungeons (ie GB and GA).

Is it as follows:

1 Tank
1 Healer
2 Ranged DPS
2 Melee DPS

Also, is the composition pretty much the same for all 6 mans?

Thanks in advance.

Sarah