You wrote: "There is too much yellow and a lack of magenta in the converted raws with LR"
Which profile are you using in Lr / Develop Module / Camera Calibration / Profile? It's on the right side the last panel at the bottom.
If you are using <Adobe Standard> chances are that your photo has too much red for your liking.
I noticed this recently with my D600. The profile <Adobe Standard> gives a bit too much red/yellow/magenta. And that is so by purpose. Adobe has this to say in the Help menu:
"Adobe Standard: These profiles significantly improve color rendering, especially in warm tones such as reds, yellows, and oranges, from earlier Adobe camera profiles."
Try one of the Camera profiles.
Adobe: "These profiles attempt to match the camera manufacturer’s color appearance under specific settings. Use a Camera matching profile if you prefer the color rendering offered by your camera manufacturer’s."