The Golden Age of Baseball once again--look at this list of great arms (not in any particular order):
Colavito: pure raw power, certainly a -5 arm in strat, only drawback was a slow release.
Clemente--had it all, power, accuracy, quick release. Deadly.
RJackson--Lots of power, not always accurate, still a long shot to run on in his prime.
Aaron--Underated arm--maybe not as strong as the others but certainly was up there in terms of accuracy and quick release.
Furillo--Gun. All cylinders.
Maris--Underated as a fielder and for his arm, which was strong accurate and deadly. Should be a minum -3 arm in STRAT, should be close to a -4.
Bauer--Certainly one of the best of the 50's, strong, accurate, decent release. In his prime should be a -4.
Kaline--Strong, very accurate, compact release. Is a -3 on most strat cards, believe one year he was deservedly a -4.
Rusty Staub--Le Grand Orange could gun them down, maybe not the fastest guy in the world, but his throws were tops. -4 arm for sure.