You really do not have to look so long to find complimentary mentions of Natacha Rambova. This little article stands as testimony to Natacha's benevolent nature and her natural ability to discover talent. In most cases she was spot on. I think the only error made was with Andre Daven who could certainly have had the career promised to him by Natacha and Rudolph. However, it did not work out as is revealed here. https://andredaven.blogspot.com/
A note on Natacha from her discovery Myra Loy as follow up on the previous posts. I have more narrative from Loy's book but this is a good synopsis.