It would have finished under safety car, as he would be following the rules. There was no obsession with finishing under a green flag or letting only some of the lapped cars pass.
I suspect this may go to the Court of Arbitration for Sport.
If Charlie was still around, Hamilton would have had to actually give back the advantage he gained from the lap 1 incident, so who knows how the rest of the race would have evolved.
And also my understanding is that for it to go to CAS, all parties involved need to agree to do that, and I fail to see how the FIA will agree to go to CAS over this.