I didn't pick perfect examples, I picked useful ones for bounding the rough time period. Both examples are transitional.

Alien nails it like 80% of the time (I've watched it twice in the last year, in 4k on a wall-size screen, so it's fresh for me). It's an early, major example of getting it damn near perfect pretty often. Not every shot's great—like, about two-thirds of the shots of the exterior of the landing craft look like a miniature, not as glaring as a Showa-era Godzilla or anything, but you can tell—but it's still a better average than modern computer-heavy movies. It's one of the earliest that's exhibiting the potential of peak pre-CG special effects, if not nailing it all the time. But, very few movies nail it all the time, including modern ones doing the computer graphics thing.