He will graciously inform us if my memory fails me, but I believe Blinky Bill nearly perfectly predicted the 2020 electoral college map. His only miss was Georgia, the state set to have the narrowest margin of victory in the country. Unfortunately, the image link he provided in the comments section of the election prediction post is broken. It’s not foul play on account of his prediction besting mine, which was identical to his with the exception of Wisconsin, which I also missed. I didn’t do it, I swear!
The RCP polling average performed quite well with regards to predicting the winner by state (if less impressively when it came to assessing margins of victory). The only states the polling missed were Florida and Georgia. The PredictIt state markets also fared well, missing only Arizona and Georgia.