It's a mystery how Yoo Hae-jin rose to lead actor status like that

Since the old days, when he appeared as a supporting actor playing the "common enemy," I just thought of him as a supporting player because of his short stature, mediocre looks that were worse than an average person, and the fact that he only did over-the-top comedic acting that felt like self-replication in every movie. I never thought he was a good actor because his acting and vocalization were the same in every film, just repeating the same character type~ But at some point, he started rising to lead actor status~ Honestly, I didn't understand how he became so successful when he didn't seem to have any elements that would make him popular.