I have changed my thinking on this, with our wealth of forward, mid/forward and forward/mid players and a number of players down back who can swap roles, I think we go for a flexible side which can change shape.
This means as hinted, Hooker can go back at times when Joe, JS and are Stringer forward. Gleeson could shift between the third tall defender and half back to accomodate this. McKenna or Saad could move into the midfield or go forward. Hurley can go most places. McGrath can go back or stay mid. BJ can fill in on any line or roam as an extra back.
This doesn’t have to be chaotic, you could have 2 major roles where players could keep structures in place in different roles.
All these players could play multiple roles well I suspect:
Hooker, Gleeson, McKenna, Hurley, Saad, McGrath, Heppell, Zaharakis, Stewart, Daniher, Walla, Raz, Stringer, Smith, Zerrett, Langford, Begley, BJ.
Which is 18 players out of what I consider the best 22* which gives us Sheedy like flexibility and no need for major personnel changes with different opposition, because we can change shape to defend different teams and come up with a menacing attack, which could change during the match according to what is working or to cover injuries, change it up etc.
We don’t have to go crazy like Sheeds, given the game is a lot more complex in terms of roles these days, but being able to fill 2 distinct roles with the vast majority of your players has to be a good thing, even if it will take a while to fully master.
We have a mostly young side and most of the older guys that are left are good in multiple roles.
The less flexible 4 in my best 22 were Baguley as back pocket, Ambrose as key defender although third tall defender may work if he is offset by Hooker as another key defender besides Hurley who can create and intercept, TBC as ruck and Parish as an inside mid being his calling I believe. You can argue that they all could change their role effectively, but in my mind they are clearly a lot better in their major role even though they get time in other positions.