This year that guy is Davis Webb.
Yeah, I think I read he could throw it 70 yards with ease.Mahomes
85 yards in the air with out much trouble.Mahomes
Kyle Boller supposedly threw the ball 65 yards from one knee and was picked in the first round despite not being able to hit the broad side of a barn and he still stuck around in the league for a while. Teams are willing to overlook a lot of flaws for pure arm talent. Teams will blindly hand out huge contracts to strong arm QBs who have serious flaws in their games, like Cutler, Stafford, Osweiler, Rob Johnson back in the day, Culpepper, Kaepernick, ect., while teams eschew quality, smart, accurate QBs like Cousins, Brees (SD), and Alex Smith.
Just goes to show you what the guys at Pardon My Take say, "If a QB has a decent arm and looks good in shorts, he'll stick around in the league for a while." And with Matt Barkley, Mark Sanchez, Matt Cassell, Zach Mettenberger, Josh McCown, ect... still on NFL rosters, it's tough to argue against that.
Very good points although I don't agree with all of your examples.
I've never been impressed with Osweiler's arm strength. Maybe it's he because he is so tall and has poor mechanics, but his throws don't seem to have great zip. He is not weak armed, but I wouldn't say he was a strong armed guy, either.
I also have never been impressed with Alex Smith's accuracy. Considering he mostly throws short passes his accuracy is lacking. He needs to be far more accurate to make up for his weak arm.
Drew Brees has good arm strength. He is no Jeff George, but I would say his arm strength is at least average or better. Stronger than Alex Smith and Brees is extremely accurate and throws downfield more often.