I also have to question, regarding the title of the thread, what is meant by “higher up scientists”.
There isn’t really a hierarchy so to speak, other than what universities may have, with professors, associate professors, assistant professors, which is more about seniority and tenure as opposed to importance. There are scientists who are famous, including Hawking and Tyson, but that doesn’t correlate with how smart or influential they are either. As it happens, Hawking is very highly regarded as a physicist having made some seminal contributions. Tyson has a very credible academic record in astronomy but as far as impact on the field I would not put him in the same category at all. What he does have is good on-screen charisma and a talent for explaining science to a general audience in a way that doesn’t cut corners. He also has a compelling life story. All of this makes him a good ambassador for science and science education, although lately he has been pushing the anti-religion agenda as well which is unfortunate. But I wouldn’t really call him a “high-up” scientist, although he does have a nice bully pulpit for himself at this point.
I’m trying to think off the top of my head other scientists who are household names… the main characteristic for that is you have to be a good self-promoter. I can say that among Nobel prize winners there are some who would strike you as actually quite brilliant, and others that would strike you as no smarter than your average scientist, but what really sets them apart is their passion and diligence, and in many cases their ability to drive their grad students really hard.