>>56177182Most of them, really.
Druddigon is an ambush predator that lurks in the dark, Hydreigon and its all-devouring brood need no introduction, Haxorus is the most easygoing and it's still deeply territorial and capable of slicing through steel.
Garchomp is an all-terrain apex predator with a vicious streak. Bagon will cave your skull in like a watermelon if you lack situational awareness, while Salamence is a vindictive tyrant. Flygon turns entire deserts into minefields with its brood of antlions. Kingdra and Dragalge can sink the ship you're on and you have absolutely no way of knowing they were ever even below you until the whirlpool starts. Dragonite seems majestic until it loses its temper and you realize why it's called the God of Destruction.
Noivern is another ambush predator, but you're not outrunning this one unless you appease it with an offering of food. Turtonator is a walking landmine, that apple on the ground might be a Flapple in disguise ready to melt your face off with acid spray, Dragapult is a revenant with all the power of a jet fighter and no need to obey the rules of G-Force, Baxcalibur can freeze you solid just by sliding past you, and Tatsugiri has a very large friend at its beck and call.
Frankly, it's easier to list off the Dragons that wouldn't ruin your day. Altaria, Goodra, and Drampa are docile. Lati@s and Kommo-o want to be left alone. Alolan Exeggutor and Cyclizar seems pretty chummy. That's about it.