I’m not going to deny that Kirk and Spock are monoliths of the Trek World.
No character has approached that level, I can’t agree with. Some TNG characters at least approached that level in the heyday of the show and to some extent various VOY characters too.
I’d say Picard, Data, LaForge, maybe even Worf were (and to some extent still are) truly iconic and I’d say the same for Janeway and Seven.
What Kirk and Spock (and TOS) have that the others don’t is longevity.
It’s one thing to be a cultural icon. They come and go. Kirk and Spock are in that same sphere as Sherlock Holmes, Dracula etc. now. They are enduring cultural icons.
Not to argue with you. I agree with the spirit of your post, just not the letter. :-)
I think you’ve wandered into the wrong thread. That’s not even slightly controversial, unless you are Fireproof.