The original television series - The one African character, Uhura is nothing more than a telephone operator and note how she sits at the BACK of the bridge. She also protrayed as an object of lust.
Uhura was, by the way, a ground-breaking character and an inspiration to black people in her day. To the point where Nichelle Nichols, dissatisfied with the thin part, was encouraged by Martin Luther King to continue playing it... because that's just how thin the pickings were for black actors and actresses on the small screen at the time.
She was, of course, relatively marginal and a glorified phone operator in a miniskirt (part of which was due to TOS' pervasive sexism, which was actually a lot worse than its racism). However, I note that even here your critique of the racism misses its mark: Uhura was actually very rarely
portrayed as an object of lust, with one notable exception -- explained by alien influence -- that itself stands out as supposedly historic for this very reason. That reflected the ambient Jim Crow mores still in the air in the Sixties.
If you're talking about the Sixties and you still
can't target your critique accurately? That's something that should tell you you have some reading and learning to do before sounding off on this topic. (Also, incidentally, Uhura is not
the only Black character we see in TOS.)
Sorry for the ephemera on a thread with this kind of significance, nominally anyway, but Uhura's role definitely had that tinge as well, in Mirror, Mirror, which I don't think is the episode you're referencing.