Top 5 in no particular order-
Brady won Super Bowls with absolute nobody receivers,never had a great long arm.
Marino had the best arm.
Montana is top five but #1 I don`t know.
Manning has incredible football smarts and a good arm.
Bradshaw good tough QB,4 rings.
Didn`t make it-
Farve top five players maybe,QB no,too many interceptions,forced throws,bad decisions.
The older guys I don`t know as much about or have seen play.
A lot of great QBs there, tough choices.
Not a lot of QB`s are "born" with an arm,most actually practice to get good.