No way Biden wins v Trump. It may be a closer race than previous (and future) races, but Trump still wins. Too many people, while strongly disliking Trump, will still vote straight ticket. In their mind, they're voting for the party, not Trump.
Good thing there aren't any. I'm sure they will try to label whatever Dem ends up on the ticket as a commie, but there's really nobody that inspires Hillary level allergic reactions out there except for AOC.