Alan Raph is a bass trombonist. I first became familiar with him as one of the authors of Trombonisms. I learned how to doodle tongue from that book as an undergrad. Although I think he’s retired now, Raph is also a conductor and composer. He’s got several really interesting videos on YouTube discussing various elements of bass trombone technique.
I also found this one of him playing an unaccompanied solo. While you listen, watch his embouchure and see if you can guess his embouchure type. My guess after the break.