Here's my ranking of the top 10 SGs in the NBA this season. This is largely statistics based (specifically advance statistics based). This is also solely based upon their performance this season.
1 James Harden.....27.1 PPG, 7.0 APG, 5.8 RPG, .602 TS%, 26.62 PER, 8.47 RPM, 17.20 WAR, 20.7 EWA
2 Klay Thompson....21.6 PPG, 2.9 APG, 3.2 RPG, .589 TS%, 20.63 PER, 3.85 RPM, 8.42 WAR, 10.7 EWA
3 Khris Middleton...13.1 PPG, 2.2 APG, 4.5 RPG, .566 TS%, 15.84 PER, 6.38 RPM, 10.46 WAR, 5.4 EWA
4 Jimmy Butler......20.2 PPG, 3.2 APG, 6.0 RPG, .582 TS%, 21.24 PER, 3.09 RPM, 7.19 WAR, 11.9 EWA
5 Kyle Korver........12.3 PPG, 2.5 APG, 4.2 RPG, .707 TS%, 14.83 PER, 5.33 RPM, 9.88 WAR, 4.7 EWA
6 Tyreke Evans......16.7 PPG, 6.4 APG, 5.3 RPG, .498 TS%, 16.86 PER, 3.76 RPM, 8.60 WAR, 7.4 EWA
7 Danny Green......12.1 PPG, 1.9 APG, 4.5 RPG, .589 TS%, 16.77 PER, 4.57 RPM, 8.31 WAR, 6.4 EWA
8 Louis Williams....15.1 PPG, 1.9 APG, 1.8 RPG, .558 TS%, 19.52 PER, 2.55 RPM, 5.04 WAR, 7.9 EWA
9 Dwyane Wade.....21.6 PPG, 5.2 APG, 3.6 RPG, .542 TS%, 22.45 PER, 0.89 RPM, 3.14 WAR, 9.9 EWA
10 Goran Dragic....16.4 PPG, 4.4 APG, 3.6 RPG, .580 TS%, 17.74 PER, -0.28 RPM, 2.87 WAR, 8.3 EWA