Agreed about the bench a lot, they are not the same team they were in 2016 which was much healthier and better top to bottom taking out Durant. I also think Durant is a better overall player than Curry in more variables (different rosters, coaches, etc) and the reason I also have LeBron at such a gap over any other player in this era is for the same reason (I don't think for example that any other player in NBA history except Jordan could have won the 2016 Finals with that Cavs roster) I totally disagree however about Curry in 2016, that was one of the greatest seasons in NBA history from a number of metrics and analytics and the team record reflected that as well. To be fair, they did lose the Finals though.
Many people value different stats, but a few that many agree on some level reflect something but not everything are things like PER, BPM, W/S per 48, and VORP. All reflect some level of value and impact but all are flawed as well because they are only specifically measuring what they measure and nothing else. Having said that, 2016 was very magical for Curry in that he led the league in basically every meaningful category in those arenas. His PER that year is 8th all-time in NBA history, only four other players have ever cracked the Top 12: Wilt (1,2,6), Jordan (3,5,7,11), LBJ (4,7,11), and Anthony Davis (12th). His OBPM is first-all time in NBA history. His overall BPM was 5th all-time in NBA history, only three other players are in the Top 12 club there -- Westbrook (1), LBJ (2,4,6,7,8), and Jordan (3,6). W/S per 48 8th all-time. Only other players Top 12 ever: Kareem (1,2,4), Wilt (3), LBJ (5,7,11,12) Jordan (6,9,10), and Curry at 8. VORP he was 12th, that club all-time is Westbrook (1), Jordan (2,3,8), LBJ (4,5,9), David Robinson (6), Kareem (7), and Chris Paul (10).
I think a lot of these stats are flawed in terms of how they favor certain things over others (especially looking at Westbrook, his analytics I believe overvalue his true impact) but by that same token, Curry's season that year was simply incredible. It is fair to say it was an offensive GOAT level season that will likely not be seen again for a long time. The Warriors are a true GOAT level team to me because they have recognized how to utilize Curry in a way that impact all the other nine players in a way that has not been seen in a long time. That doesn't mean he is just a better player than Player A or B etc but it does mean that if you have him on your team, you can build the right roster/system to dominate the winning column in ways that are unique to him even over some better players.