Using data publicly available at Fantasylabs.com, here's a look at last season's top performers (and some surprising duds). This analysis is based on a singular linear regression used to project points solely based on DraftKings salary, and then compares the actual output to the salary-projection.
Due to data limitations, all information is from 1/11 onwards through the playoffs.
This is meant to be a quick glance at who the "best" and "worst" plays were last season, it is important to note that due to the relatively small sample size and constantly changing salary structure, this is not likely to be useful in a predictive manner going forward. That said, you should be playing Shea Theodore every night in Vegas.