Even though he was not directly involved, Michael Crichton is credited as the creator of the Westworld concept in Futureworld (1976) and a TV series called Beyond Westworld (1980) that was cancelled after airing three of its five episodes.
Much more successful has been the 2016 reboot TV series made by Jonathan Nolan, with 4 seasons aired by 2022. Again, Crichton ins credited as creator.