Who can 1v1

Master yi if he dodges Jax stun with his Q. With some life steal ofc

depends on which jax, jungle jax or top lane? also either way its rengar iirc he just either ults and jumps out of stealth and kills jax before he can react or jax presses e as soon as he sees the exclamation point and rengar waits it out then jumps.

{quoted}

. Who can 1v1 Jax at full build? NO ONE! Maybe if played correctly.

probably

if played well.

Potentially

MAYBE. If Jax itemizes specifically for Tryndamere (Triforce, Blade of the Ruined King, Tabi, Randuin's, Frozen Heart, Thornmail) probably not, but possibly if it's just a normal game.

certainly, and probably easily.

Any mage with enough burst, so long as they don't get jumped on from out of vision.

Not a jax. Ive done yi and almost a jarvan before with vayne.