If it were to take a year or more for the next justice to be confirmed, Chris Christie could be an interesting option.
Christie is a lifelong liberal who "evolved" on every issue when the tea party took power.
Ted Cruz would be a better option, to be honest. Hundreds of actual conservatives would be better. I'd use Christie as Attorney General for a republican president... he will HAVE to follow orders or be fired. But he's liberal on a lot of things, don't give him SCOTUS power.