Let's see, players like Cantona, Henry, Vieira, Martial, Kante, Evra, Nasri, have all done as well or better once they transitioned to the Premier League. You could argue Henry/Vieira went through a spell in Serie A but Vieira had two games in the league before going to Arsenal, and Henry was played out of position. So that's just French guys. Hazard, outside of his last season in France where he was just on another planet, has consistently beaten his output from Ligue 1 after his first season in the Premier League. Some players take a season to adapt to any new league, for reasons beyond its level of competition such as language, culture change, new teammates, etc.
You also have guys like Fernando Torres who came from La Liga and tore the Premier League apart in his first season, he had a drastic increase in output. Mickael Essien was a beast at Chelsea, Umtiti is the best center back Barcelona have straight out of Lyon, there are countless examples you could name but if you're just looking at stats without any actual knowledge of how the players played, it's kind of pointless for me to keep going because there's a lot more than stats to take into consideration, this ain't baseball.