I got assigned to kill a Dragon in Dragontooth Crater by Esbern but everytime i go there, there is no dragon to be found. I know there is a common bug here with the game not rendering the Dragon properly but as far as i can see, the Dragon is just absent. Is there some way i can fix this with the Console? Or at least complete the quest via console so i can move to another Dragon Hunt quest.

Try these

http://www.uesp.net/wiki/Skyrim:Skyrim

http://elderscrolls.wikia.com/wiki/Skyrim

Yes, i've checked them both already but no help alas.

I just went back to the Dragontooth Crater and a Dragon showed up. I killed it (with the Help of the Blades i've recruited) but the quest didn't update and still says i need to kill a dragon in dragontooth crater.

Welcome to the wonderful world of skyrim bugfest

Did you kill a Dragon there recently before accepting the quest to kill a Dragon there. If so it's probably glitched out. When a radiant quest sends you to a location that you just cleared out it causes problems.

setstage CR14 20

should fix your problem. Save before trying this.

i tried the command. it put me halfway through the dragon seeker quest with farkas but didn't fix the problem. the blades are still hanging around dragontooth crater and it still says i need to kill a dragon there.

Try

setstage CR14 100

or

setstage CR14 200


After the one I said in the previous post you should be able to just talk to Farkas for a sum of Gold and the quest will end. Not sure why it isn't working.

it isn't the dragon hunting quest from the companions, it's for Esbern and the Blades.

Does the quest have a specific name or is it a misc/radiant one?

misc/radiant. The name is always Kill Dragon at ________. with the blank always being one of the dragon locations on the map. It's recieved from Esbern after you get him and Delphine set up in Sky Haven Temple and is of course, repeatable.