The key word here is "Fantasy"!!! For "Fantasy" football I have no problem with Manning being #1, he should be because the man is all about stats and he usually has them in abundance. (I don't get involved in fantasy sports, not my bag at all, but I also don't think the fantasy experts are wrong or disrespecting Brady. Manning is definitely #1 in football fantasy land.)
For "Real" football the usual measuring sticks are wins and rings. Brady usually doesn't have the stats but he usually has the wins and he also has "3" rings - - - to Peyton's humongous, record breaking stats, lots of wins but also his "0" rings.
In the "real" football world I live in that makes Brady #1 period!