Answer 1

Sassmangg5's answer is basically correct, but here's a different, interesting way to look at things. Assuming that you are not using any of the dragons as mixed sweepers you could ignore either Attack or Sp.Attack.

In this case you get these stat totals:
Garchomp: 520
Dragonite: 500
Hydreigon: 495
Salamence: 490
Haxorus: 480

Answer 2

Hydreigon,dragonite,garchomp,salamence

Comments

You forgot haxorus with its monstrous attack

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Actually not haxorus its not that fast for a dragon type and its sp. defense isnt all that great

Answer 3

Theyre all basically the same-it depends on of you like defence or speed or attack and all. my favorite is garchomp cause it has great speed and attack!

Comments

Swords dance garchomp pwns ALL!!!

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GO SHUCKLE! USE TOXIC! NOW USE PROTECT!! What about now :P