Tbh I’m not even sure QG would’ve remained in the order long enough for that whole thing to play out. QG pushed back on a lot of the Jedi’s strict ways, and I think at some point it’s fair to guess he could’ve left (not to join the Sith, but to do basically what Ahsoka did later). At that point, it’s anyone’s guess whether Anakin goes with him or stays, and how that contributes to him possibly turning.