The WOL and Mass Murder

[YianKutku]

(to say nothing of the real Nael being very much long dead even before then).

To be fair, the real Nael never became Legatus.

This actually reinforces your general point, since I don't think Eula counts as a Legatus by the time of ARR; presumably the aetheric construct she became in the Coils is not eligible for the position. So it is indeed true that the 1.0 Warriors of Light are the ones who get the credit for taking down the Legatus of the VIIth Legion.

not even every soldier knows who we are despite having made chumps of 3* legates

ARR and later players get two. Regula was credited to Zurvan. The Emperor almost certainly knows about that, and the VIth definitely know, but other than that the information may have been suppressed.