Michael Thomas considered NFL's Best Route Runner
I can't find the link however I remember an analyst talking about CGM given the least amount of cushion on a play yet he is still able to create the most separation of top WRs (including Julio).
That was an eye opener for me.
Not only is he a great route runner, but he catch anything in his zip code.
He does everything (route running, YAC, separation) at an ELITE level.