I don't know what you are defining a system QB as, nor what your version of success in the NFL is. If it's spread then yes there are what I consider to be successful versions of spread QBs in the NFL.
The best example of what I think you are referring to as a system QB that has had the pinnacle of success in the NFL is Aaron Rodgers. Your system nonsense was what was being said 10+ years ago when he was coming out. Fast forward to now and it makes even less sense as the spread and all it's forms is everywhere in college. So it's inevitable that spread QBs are going to have success in the NFL because spread QBs are going to make up the overwhelming majority of the talent pool.
You can make a list of QBs in the NFL and there are college spread guys on it and that list is doing nothing but growing.
There are plenty of other spread QBs in the NFL. Not sure what your level of success is. Cam Newton would be the next guy up.
The best example of what I think you are referring to as a system QB that has had the pinnacle of success in the NFL is Aaron Rodgers. Your system nonsense was what was being said 10+ years ago when he was coming out. Fast forward to now and it makes even less sense as the spread and all it's forms is everywhere in college. So it's inevitable that spread QBs are going to have success in the NFL because spread QBs are going to make up the overwhelming majority of the talent pool.
You can make a list of QBs in the NFL and there are college spread guys on it and that list is doing nothing but growing.
There are plenty of other spread QBs in the NFL. Not sure what your level of success is. Cam Newton would be the next guy up.