Not sure Pence can get out the white supremacists like Trump can, but he would turn out many of the Republicans who don't like Trump and might depress the turnout for Biden a bit since he's less in-your-face obnoxious than Trump; so he probably would have a better shot. I think it's far from a slam dunk, though, a lot would depend on how he campaigns in the limited time he would have. It's unlikely that Trump will die though, the best outcome if you want Biden to win would be for Trump to be unable to campaign and still able to Tweet, IMHO.
I'm not anti-Christian. I'm anti-stupid.