in my opinion, it will always be nuthug. this was back before the meta was defined, nuthug understood the game like nobody else at the time, nobody could touch him. he was pretty much a god in every mod he played, and additionally is one of the best/most influential replay makers ever with his creative hacking and tricking replays.
now, nuthug at his prime is probably outclassed by modern duelers simply because of how the meta progressed, but for his time nuthug was a menace. so yeah, in my mind, nuthug is the GOAT