Just noticed I'd forgotten to reply to this question:
Valka D'Ur
Who the heck do you know who deserves 14 Billion years of hell?!?


Kitten killers. Obviously.
Borachio is correct, but they're not the only ones. People like Paul Bernardo, who is a serial rapist/murderer who raped many women in Scarborough, Ontario, and graduated to raping, torturing, and murdering his victims - some of whom were as young as 13 or 14 years old. His now ex-wife is just as guilty of what happened to those schoolgirls, but she got off very lightly - just 12 years in prison, and she's out now. He's still in prison and has been designated a dangerous offender... that means that even after his sentence is up, he will likely never be released. That's the best Canada can do, since we have no death penalty here.
Same with Robert Pickton. His victims were grown women, many of them prostitutes. He picked them up, brought them to his farm, killed them, dismembered their bodies, and fed them to his pigs. Investigators found body parts in freezers and hidden all over his farm. He confessed to 49 killings, and lamented that he hadn't been able to make it an even 50.
These are only two.
But yeah, kitten killers are among those I would consign to some sort of hell if it existed. Luka Magnotta used to videotape himself torturing and killing kittens (by drowning by duct taping the kitten to a broom handle and forcing them underwater, suffocation by putting them into a plastic bag and using a vacuum cleaner to suck out all the oxygen, feeding them live to a snake, and putting the videos online. There were people investigating him internationally, trying to track him down, but they didn't manage to do that before Magnotta graduated to killing a human. He chose a Chinese exchange student, and after he'd killed him, he dismembered the body and mailed parts to various places around Canada, including the prime minister and an elementary school. If authorities had taken the cat killings more seriously, that student would still be alive.
And then there's the kitten and dog that were killed in Calgary a year ago... they were found dead in an alley with their muzzles taped shut. They'd been beaten and starved and the kitten (not even a year old) had been tortured. The killer's girlfriend knew about this during the police search, but never turned him in. He was caught and sentenced, but not remotely enough.
So yeah. There are some people I think deserve 14 billion years of hell. None of them showed the slightest bit of remorse for their crimes. No compassion at all for their victims or their victims' families.