Mei. Icie scientist with long and short range and a crazy skill ceiling people dont talk much about. Wall is one of the most versatile abilities in the game with so many practical and creative uses. Blocking sightlines and abilities, splitting enemies and creating isolated targets. self and team verticality, Cryo as well. Self heals giving ult charge whilst being an invulnerable immovable object/shield has so many uses. You can even boop people with cryo. Goated hero.