I believe that the winner by definition played the best game of the season.
My only caveat would be very specific hypothetical medevac circumstances. Like say Mike Holloway wins the final immunity, but before that night's Final 4 Tribal Council he gets medevac'd for some reason
Yeah I think under the right circumstances I could say that a medevac genuinely played the best game that season, but it would have to be a very late medevac (as good as Penner was playing in Micro, his evac was just way too early to determine exactly what woulda coulda shoulda been) and the only two people that have been evacuated late enough for me to even grant that consideration didn't play even remotely good enough for me to say yeah, maybe they were the best.
I still more or less insist that the Joe Del Campo Medevac cost Aubry 1 million dollars since Michelle was 1000% going home that night.
The fact that Aubry was still in the game mitigates that. She still had the opportunity to win ---