Ich meine genau so eine Aussage wie dein Beispiel "(not) each one individually". Erst die Zufügung des Adverbs erklärt, warum each gewählt wurde: es wird so eine Aussage über die einzelnen Personen. Im OP passt es daher nicht.

Eine Variante mit 'each' im Sinne von 'nicht alle' fällt mir spontan nicht ein

How about: But not each and every one of them!

Oder einfach nur: "But not each one of them." Das müsste doch gehen im Sinne von "ein paar dürfen noch übrig bleiben.", oder?

No.

If at all, then "every one of them". But why not just stick to "all of them"?

... mein Michael Swan sagt, "each one of them" sei richtig.

And I suppose he explains in what circumstances one would use it. Of course the phrase is "correct" in itself, but that doesn't mean that it fits here.

ich vermute, es liegt an der Verneinung

I can tell you now that it doesn't.

#18 Dort heißt es " [...] You also do not use 'each' or 'each of' in a negative clause."

It's quite illogical to deduce from this that "each" would be appropriate in a given case if only the clause were not negative.

This discussion is becoming pointless.

@WittGenStein: It occurs to me that the specific content of your sentence may have limited the range of wording that seemed plausible to respondents.

Suppose Jack is the production assistant for a weekly variety show that is aired on the radio. Jack's boss has just told him he thinks they should ditch the band that has been playing regularly on the show for the past year.

Jack thinks the band's fiddle player is world class, but agrees that the other members are only mediocre. He responds:

"I agree, but not all of them. Jill, their fiddle player, is pretty damn good."

Now, though, imagine that Jack wants to keep Jill on for reasons other than her musicianship - unbeknownst to the boss (who is also Jack's brother-in-law), Jack and Jill have been knockin' boots after the show for months. So our protagonist dissembles:

"I agree, but these are tough times for musicians, we wouldn't have to ditch every single one of them, would we? We could keep on one or two... like, say, that fiddle player, what's her name again?"

Here, by using "every single one" Jack is saying that the ditching wouldn't have to be completely comprehensive, they wouldn't have to make a completely clean sweep, as it were. He could have said "all of them" in this sentence too, but would have been unlikely to stress "every single one of them" in the first situation.

(In my ears, "each and every one of them" would be equivalent to "every single one of them" here, but I am not sure whether Lonelobo would agree. Definitely though, "each" alone would not work.)

Eine schöne Antwort und Geschichte obendrein. Danke für unbeknownst und knockin' boots, die beide schon darbend dahinsiechten.

Letzteres kennt LEO gar nicht, und unbeknownst heißt hier das gleiche wie unbeknown, nämlich unbekannt oder ohne jds. Wissen (korrekt mit engl. to so.). Dem absoluten Superlativ würde ich auf Deutsch noch ein gänzlich hinzuspendieren. Lohnt das eine Diskussion oder gar eine Eintragsänderung?

(Knockin' boots is old-fashioned slang for having sex)

*inmeinenaktivenwortschatzaufnehm*

*gleichmalausprobierengeh*

It's probably the only idiom to have been the title of hit hip-hop, R&B, and country songs!

https://www.youtube.com/watch?v=i1gbn2vUaBw