I'm having a hard time thinking of one, which I think reflects the show's most glaring weakness: its writing. Great scenes are the product of a long game - a build-up of tension and drama and are not something that can be fixed or created in the edit. That Pike scene, for example, is the product of Menagerie, not anything Disco did. That makes it cheap and unearned.
A great cast and high production value and nostalgia bait can cover-up a lot. But great, stand-out scenes can't fall back on that. They need to be organic. And, as counter-intuitive as it may seem, scenes that stand the test of time on their own are almost always a creation of what came before.
Take the radiation chamber, for example, probably the franchise's single most familiar and beloved scene. The whole film exists to build-up to that one single moment. It earned it. The other measure of a great scene is its quotability. The fact that it's probably quoted more than any other scene in the franchise (in a non-ironic way) speaks directly to just how beloved it is. 'Quoteability', too, is the direct result of great writing.
While I agree that Disco is probably the best series (after two seasons) of the franchise since TOS, the show still has yet to deliver a touchstone episode - it's Measure of a Man or Duet if you will. Both of those ultimately come down to one single scene or sequence that are the products of great writing, both in terms of dramatic build-up and dialog. The Disco writers have yet to prove they can do anything on that level.
