There are LOTS of personality/intelligence/
predictors of success tests and indices out there. I’ve seen all of them over my career. One thing I’ve learned is there isn’t one “best” test. The more information you get about an employee or potential employee, the better.
Now a new one, courtesy of Ray Dalio and Adam Grant, which includes ways to be able to communicate and collaborate better with others. It’s worth it (especially since it’s free!). Make sure to register at the beginning so you can save your results.