The casually matter-of-fact use of this locution made me laugh.
There’s an awesome funeral scene somewhere in the second collection of Top Ten, a comic book about a police force in a city full of superheroes that takes the piss out of a lot of comic-book tropes. I might look it up tonight so I can properly transcribe the funeral oration; I won’t try to do it from memory.
According to Wikipedia, she’s back.
I’m pretty sure the entire Marvel universe has been replaced with clones, with the exception of Impossible Man, of course. But, I may have missed an issue where they explained that it was all a dream.
I knew a prisoner who actually tried something similar. It wasn’t an execution but his heart had stopped during an operation. He then sued to be released from prison. He said that he had been sentenced to life in prison and his life had ended when his heart stopped even though it was subsequently restarted. He argued that he had therefore completed his sentence and should be released.
I was going to dispute this, then I remembered that Kingdom Come is an alternate-universe.
Did it work?
No, I believe it was decided that that his “death” hadn’t met the legal standards for being pronounced dead.
But on a less official note, I’ve heard a counteroffer was made. State policy at the time mandated an autopsy be performed on any prisoner who died while in custody. If he would agree to submit to the autopsy, the state would agree to release him afterwards.
Hulk and Wolverine haven’t died, have they?
Like I said, she came close. She has been brought back from that IIRC. (Not like I read X-Men anymore, but that’s what I hear.)
Well, he died in Dark Knight Returns, too, but that’s an alternate timeline, I suppose.
Then there’s also Batman Beyond: Return of the Joker in which Tim Drake kills the Joker, but not before the Joker implants a chip in Tim that can transform him into a clone of the Joker by remote control.
I searched online and found a comic book forum where it’s claimed that the Hulk has been killed by the Red Hulk, the Abomination, Cable and Storm, and Deadpool. And there was apparently a time when Wolverine was killed but it turned out it was actually a Skrull impersonating Wolverine (cite).
Tintin and Asterix never died, but then I don’t know if you can say they are alive and well, since in both cases, the creator (or creators in the case of Asterix) have died.
Death of the Endless 
Most manga characters haven´t. Manga characters who die tend to stay dead.
DOCTOR STRANGE #12-#13. Everyone except Doctor Strange dies, but then Eternity is prevailed upon to make a new Earth complete with duplicates of everyone (except, of course, Doctor Strange, who proceeds to spend rather a lot of the ensuing issues musing that these aren’t really the people he knew).
Someone eventually claimed that several issues later in the same title, but without actually providing any evidence; a foe started explaining that It Was All Just A Hoax while explicitly trying to mess with Doc’s head during a fight. Problem is, said explanation (a) utterly failed to distract, which means it (b) got cut short when Doc followed up counterspell after counterspell of the other guy’s magic to simply land a solid left hook for the win.
Wolverine, Elektra, and Northstar were all killed and resurrected by The Hand in Millar’s “Enemy of the State” storyline.
Does Simon Garth count?
And, if so, which way?
Uderzo is alive and well, and has been pumping out Asterix stories ever since Goscinny died, sadly.
But the OP has American comics on his mind, the laws of European (and especially French Belgium) comics are quite different. They dont have to churn things out every month or so, and they’re far less taylorized.
Not true. She becomes mortal for one day every century, which always finishes with her death.