So here is Johnson vs. La Follette with apportionment based on only their number of votes combined.
Johnson only barely wins, largely because the South had a lot of EVs taken since La Follette got basically no votes there and Johnson didn't do great there either. Tipping point state is Washington, which was won by 3.26%—around 10,000 votes. Closest state was Massachusetts, La Follette won by 1.16%—just about 3,200 votes.
Interestingly, if La Follette had won WA, he'd have won the election with just 18/48 states