Murky vs Hanzo
Hanzo is another hero that Murky should not try to lane against. Hanzo is like Valla in that he is ranged. Unlike Valla his attack are more ability based and Fish Tank will not help against him.
Hanzo also has an escape that let him jump over walls. So even if you get him low he can usally get away.
In short switch lanes and deal with Hanzo in a team fight.