best is subjective .. Dragon Knight is a class, your race choices (if you want to be mostly dual wield dps) will be your best stamina buffed races

eg Redguard if you don't have access to Imperial

http://deltiasgaming.com/2015/06/01/best-race-and-class-choices-in-the-elder-scrolls-online/

the weapon of your choice depends ultimately on the weapon bonus that you get from passives eg.

Each axe equipped gives you weapon attacks a 50% chance to bleed enemies for X physical damage over 6 seconds.
Each mace equipped allows your weapon damage to ignore 10% of an enemy’s armor.
Each sword increases the damage of your weapon attacks by 2.5%.
Each dagger equipped increases your weapon critical rating by 5%.

http://deltiasgaming.com/2015/02/04/eso-dual-wield-skill-line/