What about Herber? I found this (below) on him and to be honest never knew much about him...interesting.
1. Arnie Herber (1932-1940)
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Adjusted QBER:
18.44
I remember seeing him at the Packer Hall-0f-Fame and not knowing who the hell he was. He was the Packers most effective quarterback ever, that’s who he was. During his short but brilliant career, he was above average in all three major categories, and his incredible 16.1 yards per completion in 1936 still stands as the highest mark ever, and his 33.09 QBER that season not only led the Packers to the World Championship, it is the second highest single season QBER I have found to date (the highest being Sammy Baugh’s ridiculous 1945 season — check out those stats some time). To put it in perspective, Tom Brady’s QBER from his tremendous 2007 season was 21.77. Dan Marino’s legendary rookie season in 1984 was 22.52.