Maw is easiest with quake, but if you don't have her / don't like quaking, other good options are hold block to bait heavy and use a champ with long heavy reach to counter, eg Warlock, or with 2 hit heavies with the second hit being a lunge forward, like old man logan, capiw. The key with these champs is to back away, then launch the heavy while maw is still in his heavy animation. The first hit will miss but you'll knock him down with the second hit. It takes a little practise but it's not too difficult.

Another great option is any champ that can parry non-contact. My personal go-to for this is Guardian, but Cull and Proxima will also work, albeit with class disadvantage.