The premise of your argument for Baugh is consistently founded upon the fact that:
a) he could throw the ball well (just like a thousand other NFL QBs)
b) he did it when nobody else had figured it out yet...he was the first real passing QB
Those points are well taken, but being the first to do something shouldn't be such a huge multiplying factor. There are so many other things that would have to be accounted for as well, if you're being fair:
a) Did the same "newness" of Baugh's abilities enhance his probability of success?...i.e. Baugh is lauded for being the first QB to use the forward pass, and that's great, but that means opposing defenses weren't as prepared to defend it, b/c it was a new thing...and Baugh benefited from it.
b)Baugh played when defensive schemes, and offensive schemes were much simpler.