Off tank hands down was the hardest and also most competitive role in the game. At the highest level they fought Frontline, peeled for backline, assassinated dps/supports, contested snipers.
Hanbin is the greatest off tank player of all time. I have never seen a more "fine ill do it myself" player in all my time watching Overwatch. The things that he's capable of on Queen, Sigma, Zarya, and DVA transcend the limits of the role itself. He is a DPS player playing Tank. Ill never forget how he (and ChiYo) clutched that Lijiang Tower Control Center against Shock off the back of a well placed Rampage. The amount of confidence in your own abilities to go for shit like that is unfathomable to me. Truly one of the GOATS of the sport.