Podkopayeva vs Shushunova vs Liukin vs Miller

How do these 4 particular gymnasts rank against each other all time. My order would be:

1. Shushunova
2. Miller
3. Podkopayeva
4. Liukin

Although I could also possibly see: 1. Miller, 2. Shushunova, 3. Podkopayeva, 4. Liukin or also 1. Shushunova, 2. Podkopayeva, 3. Miller, 4. Liukin

I have no doubts Liukin ranks the lowest in history of those 4 for myself personally. I could see a case for Miller either being above Shushunova or below Podkopayeva, but really none for Podkopayeva being over Shushunova unless one really values artistic impact heavily.

Podkopayeva vs Shushunova vs Liukin vs Miller