Arnold Schwarzenegger IS the Terminator. It’s very difficult to think of anyone else in this role. But one movie exec thought otherwise…

Schwarzenegger started a rumor in 2019 that O.J. Simpson was the first casting choice as the titular robot villain. This came from an interview with The Independent. Now, director James Cameron is debunking the rumor… mostly.
O.J. was never in serious contention for the role of The Terminator. Cameron says one studio exec pitched the idea and it was immediately shot down.
Source: Variety