Problem with doomfist is, he's predictable and slow to come in with the combo. If he hasn't started his combo you know he's going to charge up and come at you. You can side step it easy enough then shield bash from that angle.
Hanzos here because at my range atleast, most of them tend to stay on the low ground or push forwards. You know the types who run forward to scatter shot to the ground.
Junkrat I've been playing a lot recently, I just count his shots before moving in. The most trouble I have with a junk rat is either A) He dies and the grenades clip me. B) Even with his nerf, his throwing mine is lethal because of her low hp.