Adam Blackstone is in the mix for me. But…..
I’m told 90% of being a session player is how you are on the hang, how easy you are to get along with and punctuality. There are other added bits such as programming for the production or arranging too, stuff we never get to see from the stage.
Unless you’ve hired them, it’s hard to know how valuable they are outside of the hour or so on stage/ on the records.