To me, you cannot judge a moment removed from its context. The 2003 LSU game in Baton Rouge and the 1980 Florida game in Jacksonville both featured 93-yard touchdown passes, but one came in a disheartening loss and the other provided the most dramatic moment of a national championship season. To equate them merely because they both covered 93 yards is to claim that the period from 1891 to 1895 is as important a stretch of American history as the period from 1941 to 1945 because they both covered four years. I think David essentially concedes this point by ranking Brandon Boykin's 81-yard touchdown return against Texas A&M while affording only "honorable mention" status to his 100-yard touchdown return against Tennessee.
Accordingly, I would rank Bacarri Rambo's pass breakup against Auburn and Caleb King's 75-yard run against Georgia Tech as the top two plays of the year for the Bulldogs, since the former sealed the win over the Red and Black's oldest (and, I would argue, biggest) rival and the latter answered what looked like a patented Yellow Jacket second-half comeback in the making. I would rank Rambo's defensive play No. 1 and King's touchdown run No. 2, but, then, I prefer defense to offense, and, while I find the Ramblin' Wreck annoying, I hate Auburn. Your mileage may vary.
Still, it's a good list and I quibble with the order, not the choices.