My rankings are:
S: Saiyan arc / Namek arc
A: 22nd Tenkaichi arc / Android arc / Buu arc
B: King Piccolo arc / 23rd Tenkaichi arc
C: Pilaf arc / 21st Tenkaichi arc / Red Ribbon Army arc / Moro arc
D: Baby arc / Shadow Dragons arc / Champa arc / Zamasu arc
F: Super 17 arc / Beers arc / Golden Freeza arc / TOP arc
The BOG and RF movies were part of a movie tournament a few months ago so they don't qualify, same goes for Broly.
UPDATE:
Based on 20 overall votes, 20 for Z, 19 for DB, 18 for Super, & 16 for GT, these are the final results of this fair arc election:
The number one arc with an outstanding 92 points is: