I thought about this question a little longer and many Manly players including Phil Blake came to mind...but in actual fact , none were near as dominant as Tom Turbo in 2021.
Then thinking outside the square the 2 closest I could think of are from "other teams"
1 would be the season Jarrod Hayne was almost unstoppable and single handedly converted the Eels from an average side into a Grand Final team, but was more a handful of games back end of season.
The other was Ben Barba who was electric at FB for those dirty Dogs and had a season carving up almost every team in the NRL.
Funny that both teams fell short in the GF against Storm, who seem to have a habit of shutting down opposition Superstars like no other.
Still reckon Tom in 2022 was the Best, but those 2 deserve a mention based on those 2 seasons...thing is Tom has the ability and potential to do it his entire career and they were more just that season.