I've tried out a bunch of QBs over the year, but here are the ones I've used the most:
Vick
Boomer Esiason
Marino
Cunningham
Russell Wilson
Namath
UL Vick (What I'm currently using)
I've probably have played most consistently with both Vick cards. I had escape artists on the Legends card, and that was fun, with the UL all I have is Gunslinger on him. I know a lot of people can't stand that he's left handed and has Slinger 4 as his release, but I haven't had problems with either. I actually am more of a pocket passer when I play and rarely scramble but I've had a lot of success using this UL card that I currently don't want to mess with the formula.