Since they cured Ebola in monkeys (congratulate your mother on that one for me), and the only thing that can kill Chuck Norris is a bad Chuck Norris joke, let's take that one off the table.
That leaves us with Schwarzenegger and AIDS, right? But since AIDS hasn't taken down Magic Johnson, how bad can it be?
So really, your question is stupid. AIDS is harmless, Ebola has been (sort of) cured, and I'm left to decide which old, used to be famous white guy would survive the longest.
What exactly are they surviving? Considering they're both very wealthy, I can say for sure they're going to outlive you.
But ... let's pretend you're not a total idiot and answer this question at face value. Arnold would have to bleed all over Chuck Norris if they got into a fight, otherwise his AIDS is useless.
All Chuck Norris would have to do is breathe on Arnold, and he'd be dead in seventy-two hours. The thing is, if Chuck is that contagious and plague riddled, he probably won't be anywhere outside of a hospital bed. So the odds of him facing The Govenator in mortal combat, and winning, are slim.
Of course if Arnold pulls a Killer Kowalski and shows up at Chuck's bed to mock his suffering, Chuck may have the upper hand.
Unfortunately, Arnold isn't Polish like me or Kowalski, so he's not an idiot and won't be going to any hospitals any time soon.
That means Arnold wins, and since Chuck would be dead in a matter of days, he would also survive the longest.
Fantastic question!
In fact, it's such a good question that I'm willing to overlook the fact that you're a fucking loser for asking it. I mean, this is the shit that keeps you up at night?
Here's the thing; Norris is immortal … you've read the fact book. While it's nearly impossible to outlive an immortal, if anyone can do it, it's Schwarzenegger. Any man that can survive with a wife that looks like Skelator's retarded daughter has my vote.
Going one level deeper, you need to ask yourself, how did they contract their respective disease? In the case of Norris, it's most likely that in some sort of heroic attempt to suck the radiation out of the contaminated water near Japan, he swallowed the semen of a monkey that was mid-orgasm when the Tsunami hit. It's a case of being in the wrong place at the wrong time.
On the other hand, if Schwarzenegger contracted AIDS, it's probably because he wanted to.
Here's how I see it: In order to resurrect his career, his agent tells him he needs a feel-good angle that his aging fans could rally around. He likes the idea and takes it one step further — death. He sees this as the way out of his shitty post-Jingle All The Way career and marriage with his dog-faced wife. He sets the date and contracts the disease in a three-way orgy with Jean-Claude Van Damme and Danny DeVito.
My initial reaction was to go with Schwarzenegger, but I'm just not sure he has the will to live (and I can't blame him). With that said, my final answer is Norris.
God damn, great fucking question.