Artists of Splash Art

Hello ! I have a work for school about "Art Video Games" and I choose League of Legends to talk about it. But I need to know who is the artist of Ahri new splash art, Eternal Sword Yi, Aurelion Sol, and Project Jhin splash art. I choose them because the art used to draw them is really different and I want to talk about it, and to prove it's not one single artist who done that; I really need their name ! ^^ Thanks :)