League of Legends
While I have yet to see Arcane (shame on me!), I have always loved the League of Legends art style. In particular, I love the splash arts. The highly rendered quality of them is simply fantastic, and they tell the stories of the champions well. Here are may favorites!
Coven Ahri
Huyy Nguyen
Snow Moon Ahri
Terry Cantal
Chosen of the Wolf Ambessa
Bo Chen
Briar
Horace Hsu
Arcade Caitlyn
Jeremy Anninos
Evelynn
Jessica Oyhenart
Bloodmoon Evelynn
Esben Rasmussen
Coven Evelynn
Alex Flores
Masquerade Evelynn
Andrew Theophilopoulos
Lillia
Jennifer Wuestling
Spellthief Lux
Jem Flores
Star Guardian Lux
Jean Go
Bewitching Morgana
Alex Flores
Coven Morgana
Alex Flores
Star Nemesis Morgana
Horace Hsu
Coven Nami
Joshua Raphael
Spirit Blossom Riven
Chengwei Pan Pro
Spirit Blossom Riven
Bo Chen
Battle Dove Seraphine
Alsie Lau
Prestige Ocean Song Seraphine
Sora Kim
Beemo
Esben Rasmussen
Little Devil Teemo
Kelly Aleshire
Spirit Blossom Teemo
Jem Flores
Vladimir
Michal Ivan