I don't see portraying Luthor as a land-obsessed con man accompanied by a smattering of dimwitted henchmen as a minor background thing. It's probably the least impressive version of Lex Luthor we've ever had. Both the brilliant criminal scientist and the ruthless corporate magnate (and the DC Animated Universe version, who was a mix of both) were more interesting than the Donner/Singer version of Luthor. Hackman made him funny to watch, but man, what a lame interpretation of the character.
If you ask me, the only real Lex Luthor we've ever gotten in a live-action Superman movie was Robert Vaughn in Superman III
. Sure, his character was named Ross Webster, but he was a criminal who controlled a vast corporation and used its resources to support grandiose schemes that increased his wealth and/or combatted Superman. He was a prototype for the businessman Luthor we got a few years later in the post-Crisis reboot. And he was a more credible villain than Hackman's Luthor ever managed to be.