From experience....
-Basair don't deserve a lot of the crap they get...
-Good luck in accessing SFTC. They're behind locked gates last I checked!
-Crane Air, now Pacific Flight Services are fantastic-almost a secret on the airport, really cheap with really great aeroplanes, good staff and seemingly endless aircraft availability.
-SAC seem quite good too.
-Schofields are also very good and professional.