Think 5200 is in the middle of your first two, since I believe architecturally it was a 400 without a keyboard (or more accurately, the 400 was basically a 5200 with a keyboard).
But yeah, that's super interesting too. I skipped Lynx in my console journey so wasn't as familiar with that, but I didn't realize the 3DO (which I did have) was loosely part of the talent family too. But yeah, now that I think about it, I guess Hawkins must have ended up tapping the talent pools freeing up from the ST/Amiga/GS generations since those died out right around the time 3DO was being developed.