yes nightcrawler has, well sort of. rogue, merged with nightcrawler AND colossus power teleported a part of nimrod. but rogue said it still hurt even amped with her own durability + colossus. she said it would have killed nightcrawler alone, or something to that extent.
night crawler could not teleport hulks head off, or even a limb without severe injury, or possibly even death...
Let's not forget the possibility that Hulk could react to NC teleporting in and then 1-shot him. Big Green is quite fast, fast enough to pull that off.
True but with a bloodlusted NC should be hard to tag. I wouldn't say hulk's chances of hitting are greater than NC pulling a fatality move 1st. but thats just my opinion.