What four contest matches are on the Contest Upsets Mount Rushmore?

I picked Starcraft over Halo because it's a 16 > 1 (still the only one we've seen), and it was the big Ulti upset special, which eventually helped him win the contest and become Ulti as we knew him.

I also don't think Frog > Chief really fits the spirit of the question either way though. It wasn't a massive casual upset. People remember it because it was close and had massive vote swings, not because it was shocking.

Also it's not that 22% of people had Frog beating Chief. 22% of people had Frog getting to Round 3. There is a distinction.