FT attempts is the first thing I think of
Makes a lot of sense, but it's a list dominated by bigs. Either by virtue of efficient low post scoring (and getting fouled in the process) or just being the target of hacking. Notably, in NBA history Reggie Evans has the highest FTr (free throw attempts per field goal attempts). Dwight Howard is number two, followed by former Magic sixth man Donald Royal (a legit shot creator).
Perhaps a decent proxy is
FGA per team possession. That doesn't indicate who is a good shot creator per se, but those guys tend to be the ones taking the most shots on their respective teams.
Number one is Jordan, followed by Freeman Williams, Wilkins, Bryant, Anthony, Iverson, and Westbrook. Seems to pass the eye test.