The best QBs: Remember Roman Gabriel?

Pro-football-reference.com's blogger Chase Stuart ranks the all-time best quarterbacks. Here is his list:
1 Dan Marino. 2 Peyton Manning. 3 Steve Young. 4 Fran Tarkenton. 5 Joe Montana. 6 Dan Fouts. 7 Johnny Unitas. 8 Ken Anderson. 9 Roger Staubach. 10 Len Dawson. 11 Brett Favre . 12 Norm Van Brocklin. 13 Sonny Jurgensen. 14 Otto Graham. 15 John Elway. 16 Bart Starr. 17 Boomer Esiason. 18 Kurt Warner. 19 Tom Brady. 20 Roman Gabriel.
The article is packed with tidbits, but the one I found interesting was this one: "There’s not much to say about Marino that hasn’t already been said. But here’s something interesting — if you ignore sack data, Marino would have came in at ninth on this list, with everyone in the top 10 besides Dan Fouts passing him. Marino added 5,622 yards above average as QB when looking just at AY/A, compared to the 8,593 yards above average when including sack data and using ANY/A. That’s interesting to me for two reasons. One, for Marino haters, it’s much, much easier than I would have thought to discount his incredible raw statistics, by simply ignoring his ability to avoid sacks. Two, for all the talk about Marino, his ability to avoid sacks rarely seems to come up in conversation. That’s unfortunate."
Here's the link to the story laden with info: http://www.pro-football-reference.com/blog/?p=547#more-547