I always forget tyrod. Watson may be above him too, that's yet to be seen though.
I started thinking about that right after I posted that
Cam
Tyrod
Mariota
Russell
Smith
Watson
Dak
Bortles
Kizer
Wentz
Jameis
Cam and Tyrod are obviously a different level from everybody else. Cam is more power and Tyrod is more finesse but they get similar results.
Mariota is probably just as good but (from what Ive seen at least) he hasnt really matured enough to look down the field while scrambling. He usually just kind of uses his mobility to tuck and run when plays break down.
Russel/Smith/Watson/Dak are all similar levels of mobility imo, where they use it more to keep plays alive but can really get behind a defense if they dont keep an eye on them.
Bort and Kizer are athletic as shit but not good QBs so its a different situation.
Wentz and Jameis have that slippery avoid a bunch of sacks mobility, but theyre not crazy dangerous out in the open field really.
Lots of different levels of mobility.