As a golf fan (though I am inverse, I ENJOY watching it on TV....but don't play), while Cool Chris is not wrong in his assessment, I would add....
Since Tiger Woods burst onto the scene back in the 90's, the tournament that got the most coverage was the one he was playing in next.
There have been a couple of other "characters" that temporarily moved the needle, most prominent of those being John Daly....when he won the PGA as a freewheeling swinger of the driver, a chain smoker, a ubiquitous drinker, and sporting a mullet.
And Phil Mickelson....because of the kind of Cold War rivalry with Tiger (which early in their careers wasn't much of one)...and that he was often more characterized as a relatable "everyman" (except that he's a multi-millionaire) that still had crazy skills.
Today, there is the somewhat contrived rivalry between big hitters Brooks Koepka and Bryson DeChambeau. Koepka is the too cool for school guy with a relatively quiet demeanor (but is blunt when interviewed) and a clutch gene accordingly, and the more flamboyant DeChambeau being a freakish hitter off the tee (400 yard drives not out of his realm)....but is still young and hasn't really carved a substantial niche in winning multiple big tournaments (yet). They can't "carry" golf like Tiger did (does?), but they are legit talents who are fun to watch play (though a lot of people who really follow golf might say Spaniard Jon Rahm is better than both of them)....and who do seem to dislike each other to some extent. The PGA powers that be are on the fence with promoting that divide, as it flies in the face of the comradery ethic of golf....in addition to not wanting to embrace the somewhat disingenuous origins.
But Tiger is (still) king (no pun intended)....even if just as a specter of sorts right now.
Yes, the majors are the most coveted and talked about/covered/watched. However, there is what they call the "5th Major"....the Players Championship. Though I would say most of the prestige associated with that tournament is among the players themselves (so the title fits).
There's also this thing called the World Golf Championships...a cluster of 4 tournaments that get all the best players in the world together for BIG dollars and overall season bragging rights. Most casual fans of golf may not even be aware of this relatively new event(s).
Finally, the Ryder Cup is still kind of a big deal. It's a longstanding rivalry with patriotic overtones between European countries and the US. It's little cousin, The President's Cup, similar....but not with the same esteem (and has a larger mix of different countries MINUS Europe that tends to dilute down the intensity of the rivalry somewhat).