Kevin Hart like Adam Sandler can only do what he currently does - he’s not a movie star as he couldn’t open any other kind of movie.
Maybe Keanu. There’s alot of love for Keanu.
They were essentially brands, and the studios have figured out that rather than create a brand around an actor, they just create a character and run with it. Thinking about the other thread where you take the movies of one star to the desert island, Arnie had a historic run with Conan, Predator, Running Man, Total Recall, Terminator, Commando, Twins & True Lies. Made him the biggest star in the world. He made those movies into hits as the public wanted to see more and more of him. In today’s market he wouldn’t get to make those movies, instead he’d be busy filming Predator 3 and Running Man 4. True profit is in franchise sequels - it’s the safest investment, and that’s where things are going to stay. Tome Cruise had a similar arc - Top Gun, Risky Business, Cocktail, Color of Money, Rain Man, The Firm, A Few Good Men, Jerry Maguire. A different franchise every year. You wouldn’t get an actor having those types of opportunities any more.
Without that long list of different movies actors can’t escape the one role that made them a star. Chris Pratt is pretty much done now - he’s had Starlord and he never got his second franchise, his Indiana Jones.