I view our current main core as being Aho, Slavin, Svech and Jarvis. So half were drafted by current borg. Yes technically Waddell was GM but Tulsky was very high up/involved, Dundon was involved then and still is and our scouts and other front office staff are still largely the same with Waddell gone so I consider Svech and Jarvis from the current borg. And Nikishin is extremely likely to very quickly prove to be a core piece for us, also drafted by current borg.
Some other key pieces right now that could maybe become core pieces if they improve/we keep them long term or could be considered core pieces right now include: Martinook, Staal, Blake, Rantanen, Kotkaniemi, Chatfield, Koochie, Orlov. All of those were either drafted by or acquired by current borg, except for Staal.
This roster has evolved a ton in the last few years and there really are very few remnants left from the pre-Dundon front office. In fact, the only players remaining from before Dundon are Aho, Slavin and Staal. So I think your premise is flawed at this point. Your point would've been true a few years ago but with Pesce, Turbo, Necas, etc. all gone now it doesn't really hold any more.