At least in my personal experience, the combination of doing interesting things and talking about them in a somewhat public setting is something almost all really successful people do, and what few don't have a friend who is a hype man for them.

While there are charlatans that are all talk, it's extremely common among genuinely brilliant people to work too much and don't do enough talking about it. Talking about what you're doing opens doors. It connects you with other people. It gets you funded. Being brilliant in obscurity does not.

Richard Feynman and Julian Schwinger won the nobel prize the same year. Both are fairly brilliant theoretical physicists and the prize was well deserved, but only one of them was charismatic and loved to talk about himself and what he was doing, and as a result, is much more of a household name even today.