ok, i'm enountering this bugged dragon.
from googling and youtubing, this is not unique case to me.

i have a constant ctd somewhere in Falkreath.

when I keep approach an area, below 2 things can happen:
a) CTD - well, it's not the point for this topic
b ) a dragon popped in the sky

it is NOT moving, 100% frozen in the sky.

i can shot it, i can bring it's health downed to zero, but it WON'T died, it keep remain frozen in the sky, as if still alive, because my follower is reacting to it.
so, it's invunerable

i tried few console command
a) killall - does nothing to the dragon
b ) disable - nothing

this super dragon or ctd , is consistent and reproducable

anyone know how to kill/remove this super dragon, even with console command?
it seems like this super dragon even "owned" or beat the console command

You said disabling didn't do anything - Sure you clicked the dragon and not something else like a bird, cloud or whatever? Try flying up to it with the tcl or tfc command in order to properly select it. And what about a resurrect command on the dragon?