This is a bit dependent on 'area of expertise'. A fire dragon is the best at breathing fire; a sea serpent is the best in the water etc. In terms of strength however the distinction would have to go to the Cold Drags on land and the Midgard Serpent in the sea.
dragon
in my opinon garchomp
The most powerful dragon move is roar of time which can only be learned by dialga. otherwise it's Draco meteor
The most powerful dragon that is not a legendary or pure dragon in Pokemon is Dragonite. It is a flying dragon that has balanced stats and is extremely strong
the biggest and strongest dragon.
pure dark dragon
electric/energy There is no most powerful element in DragonFable.
In terms of stats, Dragon Master Knight and Five-Headed Dragon hold the title of having the highest ATK and DEF of any Dragon-Type monster at 5000 each.
the most powerful weapon is the lost katana it is +110
One of the most powerful monsters that can defeat Buster Blader, the Dragon Destroyer Swordsman in a duel is Blue-Eyes White Dragon.
the most and best dragon is the legendary dragon its attacks are head butt, legendary wind, paralysingspell and rainbow attack
A Bagon is a dragon type pokemon. A Bagon evolves into a Shelgon at level 30, and Shelgon evolves into Salamence (a dragon-flying type) at level 50. My Salamence is one of my most powerful Pokemon. If I were you, I would raise that Bagon. :)