Single rankings as in there are several statistical rankings such as KPR, K/D, KAST, AWP KPR etc. etc. etc. Not subjective rankings but merely statistical ranks.
Not sure where winnings rate on the overall ranks, but if it plays a big part, then Dev1ce should definitely be in the lead. If not, then probably not as much. Although ZywOo has dropped massively the past couple of months. His four flashbots seem to come up short :)))