I considered him a major villain as he was the main villain in the beginning(the Jack Slater movie preceeding the one the majority of the film revolves around), and appears several more times in flashbacks as well as having a very prominant role in the film's second half when Benedict resurrects him with the magic ticket. Also, he dies twice in the movie, once in the beginning; which I count it as a death because in the continuity of Jack Slater IV, he has been dead for years, that is, until Benedict brings him back in the real world presumably by saving him from the fall as he seems to remember everything including how he killed Jack's son, which happened just as he was falling to his death, so Time Travel (as Benedict visited a previous Jack Slater film to get him and thus would have journeyed several years into the past in the Slater continuity) may also be an aspect as it was used to bring him back.