Henry Armstrong, Roberto Duran, Mickey Walker, Emile Griffiths, Sandy Saddler, Marvin Hagler, Rocky Marciano, Joe Frazier and Dwight Qawi, are the first that spring to mind. Harry Greb too, based on fight reports.
Of those not mentioned, I would say Chavez, Barry McGuigan, cruiserweight Holyfield. All three seemed to incorporate punches into their steps so there was an immediate impact in their ring cutting rather than throwing the punch once they'd trapped an opponent.
Jose Napoles. He would sometimes immediately move to a more confined area of the Ring once a round started to make his opponents come to him, and they would suddenly find their backs against the ropes.
Fighting Harada was so good at this, sometimes to his detriment, he would just insert his head and shoulders into the flight path, take a punch but capture the flag. Maybe the most interesting example of this is actually a losing effort Famechon II. The first time Famechon drops him, 11th or 12th, he's right back at him like a torpedo. He did actually force Famechon to abandon his strategy, but he was just too hittable by this stage to get away with it. But it's a fascinating exercise in cutting off the ring, instructive, and weird, and kind of haunting because you know the punishment is mounting and you know the result of the fight so it's impressive but spooky. Pascual Perez was shorter than and outreached by all of his major opponents and his technique was fascinating too, he would try to get his opponent in position to punch then ease the pressure, sometimes even taking a step away, trying to bait the counter. It's a sort of weird pressuring of the space rather than the man, late era Juan Manuel Marquez did this also.
Roberto Duran Henry Armstrong Julio Cesar Chavez Jose Napoles Jeff Fenech George Foreman Joe Frazier Fighting Harada Jake LaMotta Barry McGuigan Gennady Golovkin Roman Gonzalez Jung Koo Chang
A few not mentioned: Thomas Hearns Joe Louis Alexis Arguello Mike Tyson. In their primes they could make the ring extremely small.
Henry Armstrong fought guys who stood right in front of him. That was the clinch box era. Hit clinch , hit clinch. Rinse n repeat. Put Henry in the ring against Keith Thurman and he wouldn't land a glove