KOB, you really are a stickler for anyone in light blue. Where we differ is that those you say were near the end of their careers, I say were beyond the end and only the continued ineptness of our national coach kept them in the squad/team.
Right at the moment, it is impossible to say what test rugby will look like over the next year or two, so you've really asked for an impossible task. Who knows if some or many of the likely stars will even be playing rugby in three years time, or if they're playing overseas whether they will be eligible for the Wallabies. With those caveats, the likely prospects (ie leaving aside the most established players currently) imo are:
Props - HJH (Harry Johnson-Holmes);
Hooker - Folau Fainga'a;
Lock - Darcy Swain;
Backrow - Valetini, McReight, Wright, Wilson, Harris;
No9 - Fines;
No 10 - Lolesio;
Outside Backs - Tom Wright, Hunter Paisami, Jordan Petaia, Jack Maddocks.
There're 14 names for you. I expect most of them will establish themselves in the Wallabies sooner rather than later, and that will see a distinct improvement over the performances of the past 4 years. Incidentally, that comprises 6 Brumbies, 5 Reds and 3 Waratahs. No Rebels. Can you say that that is an uneven balance biassed towards the Brumbies given form over the past couple of years?
Now, in return, you might like to participate in your challenge too. Who are your most likely influential players over the RWC cycle?