They utilize the Tommy Jarvis protagonist in three very different ways, and there isn’t a massive character arc that strings them together, but they lend an air of continuity to a series that rarely bothered to have any.
Why does Tommy remain a consistent fan favorite? Examining the popular decisions of other franchises may help bring the issue into focus.
Surely we can agree that Dr. Loomis lends weight to the Halloween series as the boogeyman’s foil. He’s what every villain’s nemesis should be: resourceful, determined, and flawed. It’s this combination that I would argue makes him an enduring character.